Add St. Gabriel Archangel, the Annunciation, St. John Damascene,

St. John Capistrano -- March complete

Finishes March's sweep of previously-never-added sanctoral content.
The Annunciation (Mar 25) was one of the two feasts literally named in
this app's original stale "fixed BVM feast, excluded per the usual
convention" note (alongside Purification, already fixed).

St. John Damascene is the first common-of-a-confessor-doctor saint;
his own Commune/C5a points its own Benedictus antiphon back at C4a's,
so he reuses the already-authored
benedictus-antiphon-common-of-a-confessor-bishop.yml directly rather
than duplicating it.

npm test (365 tests) and tsc --noEmit both pass.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/data/propers/nocturn-readings/annunciation.yml

@@ -0,0 +1,133 @@
+# Matins Nocturn 2-3 readings for the Annunciation of the Blessed
+# Virgin Mary (Mar 25). Sourced directly from
+# web/www/horas/Latin/Sancti/03-25.txt, English/Sancti/03-25.txt.
+# (Lectio1-3, Isa 11:1-5, left to the bible-plan store as usual.)
+#
+# Nocturn 2: Lectio4-6 combined into one reading, Pope St. Leo the
+# Great's sermon.
+# Nocturn 3: Lectio7's Gospel citation (Luke 1:26-38) is a bare incipit
+# ("Et réliqua"), so only the homily is authored (not marked isGospel),
+# St. Ambrose's homily (Lectio7's homily + Lectio8-9 combined).
+id: annunciation
+readings:
+  - nocturn: 2
+    isGospel: false
+    source: "Pope St. Leo the Great, Sermon 2 on the Nativity"
+    text:
+      la: >-
+        Deus omnípotens et clemens, cujus natúra bónitas, cujus volúntas poténtia, cujus
+        opus misericórdia est, statim ut nos diabólica malígnitas venéno suæ mortificávit
+        invídiæ, prædestináta renovándis mortálibus suæ pietátis remédia, inter ipsa
+        mundi primórdia præsignávit; denúntians serpénti futúrum semen mulíeris, quod
+        nóxii cápitis elatiónem sua virtúte contéreret, Christum scílicet in carne
+        ventúrum; Deum hominémque signans, qui natus ex Vírgine, violatórem humánæ
+        propáginis incorrúpta nativitáte damnáret.
+
+
+        Nam quia gloriabátur diábolus hóminem sua fraude decéptum divínis caruísse
+        munéribus, et immortalitátis dote nudátum, duram mortis subísse senténtiam,
+        seque in malis suis quoddam de prævaricatóris consórtio invenísse solátium; Deum
+        quoque, justæ severitátis exigénte ratióne, erga hóminem, quem in tanto honóre
+        condíderat, antíquam mutásse senténtiam: opus fuit, dilectíssimi, secréti
+        dispensatióne consílii ut incommutábilis Deus, cujus volúntas non potest sua
+        benignitáte privári, primam pietátis suæ dispositiónem sacraménto occultióre
+        compléret; et homo diabólicæ iniquitátis versútia actus in culpam, contra Dei
+        propósitum non períret.
+
+
+        Adveniéntibus ergo tempóribus, dilectíssimi, quæ redemptióni hóminum fúerant
+        præstitúta, ingréditur hæc ínfima Jesus Christus, Dóminus noster, de cælésti
+        sede descéndens, et a patérna glória non recédens, novo órdine, nova nativitáte
+        generátus: novo órdine, quia, invisíbilis in suis, visíbilis factus est in
+        nostris; incomprehensíbilis, vóluit comprehéndi; ante témpora manens, esse cœpit
+        ex témpore; universitátis Dóminus servílem formam, obumbráta majestátis suæ
+        dignitáte, suscépit; impassíbilis Deus, non dedignátus est homo esse passíbilis;
+        et immortális, mortis légibus subjacére.
+      en: >-
+        The Almighty and merciful God, Whose nature is goodness, Whose will is power, and
+        Whose work is mercy, did, at the very beginning of the world, as soon as the
+        devil's hatred had mortally poisoned us with the venom of his envy, foretell those
+        remedies which His mercy had foreordained for our healing. He bade the serpent
+        know that there was to be a Seed of the woman Who should yet bruise the swelling of
+        his pestilential head; this Seed was none other than the Christ to come in the
+        flesh, that God and Man in one Person, Who, being born of a Virgin, should, by His
+        undefiled birth, damn the seducer of man.
+
+
+        The devil rejoiced that by his fraud he had so deceived man as to make him lose the
+        gifts of God, forfeit his privilege of eternal life, bring himself under the hard
+        sentence of death, and find in his misery a certain comfort in the accomplice of
+        his guilt; he rejoiced also that God, in His just anger, was changed towards man,
+        whom He had made in such honour. But, dearly beloved brethren, that Unchangeable
+        God, Whose Will cannot be divorced from His goodness, by His own secret counsel
+        carried out in a mysterious way His original purpose of goodness, and man, who had
+        been led into sin by the wicked craft of the devil, perished not to disappoint that
+        gracious purpose of God.
+
+
+        Then therefore, dearly beloved brethren, the fulness of that time came, which God
+        had appointed for our Redemption, our Lord Jesus Christ entered this lower world,
+        came down from His heavenly throne, and, while He left not that glory which He hath
+        with the Father before the world was, was incarnate by a new order and a new birth
+        new, in that He Who is Invisible among His own, was made visible among us; He Who
+        is Incomprehensible, willed to be comprehended; He Who is before the ages, began to
+        be in time; the Lord of all shadowed the glory of His Majesty, and took upon Him the
+        form of a servant; the Impassible God vouchsafed to become a man subject to
+        suffering; and the Immortal laid Himself under the laws of death.
+    status: { la: verified, en: verified }
+
+  - nocturn: 3
+    isGospel: false
+    source: "St. Ambrose, Commentary on Luke, Book II (on Luke 1:26-38)"
+    text:
+      la: >-
+        Latent quidem divína mystéria, nec fácile, juxta prophéticum dictum, quisquam
+        hóminum potest scire consílium Dei. Sed tamen ex céteris factis, atque præcéptis
+        Dómini Salvatóris póssumus intellégere, et hoc propensióris fuísse consílii, quod
+        ea potíssimum elécta est, ut Dóminum páreret, quæ erat desponsáta viro. Cur autem
+        non ántequam desponsarétur, impléta est? Fortásse ne dicerétur quod concéperat ex
+        adultério.
+
+
+        Et ingréssus ad eam Angelus. Disce vírginem móribus, disce vírginem verecúndia,
+        disce oráculo, disce mystério. Trepidáre vírginum est, et ad omnes viri ingréssus
+        pavére, omnes viri affátus veréri. Discant mulíeres propósitum pudóris imitári.
+        Sola in penetrálibus, quam nemo virórum víderit, solus Angelus repérerit: sola
+        sine cómite, sola sine teste, ne quo degénere depravarétur affátu, ab Angelo
+        salutátur.
+
+
+        Tanti namque mandáti mystérium non hóminis fuit, sed Angeli ore proméndum. Hódie
+        primum audítur: Spíritus Sanctus supervéniet in te. Et audítur, et créditur.
+        Dénique, Ecce, inquit, ancílla Dómini: contíngat mihi secúndum verbum tuum. Vide
+        humilitátem, vide devotiónem. Ancíllam se dicit Dómini, quæ mater elígitur: nec
+        repentíno exaltáta promísso est.
+      en: >-
+        The mysteries of God are unsearchable, and it is especially declared by a Prophet,
+        that a man can hardly know His counsels. Nevertheless, some things have been
+        revealed to us, and we may gather from some of the words and works of the Lord our
+        Saviour, that there was a special purpose of God, in the fact that she who was
+        chosen to be the mother of the Lord was espoused to a man. Why did not the power of
+        the Highest overshadow her before she was so espoused? Perhaps it was lest any
+        might blasphemously say that she had conceived in fornication the Holy One.
+
+
+        And the angel came in unto her. Let us learn from this Virgin how to bear
+        ourselves, let us learn her modesty, let us learn by her devout utterance, above
+        all let us learn by the holy mystery enacted. It is the part of a maiden to be
+        timid, to avoid the advances of men, and to shrink from men's addresses. Would that
+        our women would learn from the example of modesty here set before us. She upon
+        whom the stare of men had never been fixed was alone in her chamber, and was found
+        only by an angel. There was neither companion nor witness there, that what passed
+        might not be debased in gossip and the angel saluted her.
+
+
+        The message of God to the Virgin was a mystery, which it was not lawful for the
+        mouth of men, but only of angels, to utter. For the first time on earth the words
+        are spoken The Holy Ghost shall come upon thee. The holy maiden heareth, and
+        believeth. At length she saith Behold the handmaid of the Lord be it unto me
+        according to thy word. Here is an example of lowliness, here is a pattern of true
+        devotion. At the very moment that she is told she is chosen to be the mother of the
+        Lord she at once declareth herself His handmaid. The knowledge that she was Mother
+        of God caused in the heart of Mary only an act of humility.
+    status: { la: verified, en: verified }