Add the Most Holy Name of Jesus (Jan 2) as a proper temporal feast

Historically a floating Sunday (Jan 2-5, fixed to Jan 2 when no Sunday
falls there); per direct instruction this is instead fixed to Jan 2
every year for simplicity. Adds the feast's collect, Magnificat/
Benedictus antiphons, full Lauds psalmody, capitulum, the three-part
"Jesu dulcis memoria" hymn cycle (Vespers/Matins/Lauds), the Invitatory
antiphon, versicles, and two Matins nocturn readings (both St. Bernard
of Clairvaux), sourced from Tempora/Nat2-0.txt. Reuses the `fixed-date`
anchor kind added in the prior commit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014axryJBrRswYh2niA7WCUc

src/data/propers/temporal/holy-name-of-jesus-benedictus-antiphon.yml

@@ -0,0 +1,13 @@
+# Read from web/www/horas/Latin/Tempora/Nat2-0.txt's own [Ant 2] (the
+# antiphon slotted after [Hymnus Laudes], i.e. Lauds' own Benedictus
+# antiphon) and its English counterpart. The source also carries a
+# distinct [Ant 3] ("Thou shalt call his Name Jesus...") for Second
+# Vespers' own Magnificat antiphon -- not modeled here, same reason as
+# circumcision-benedictus-antiphon.yml's own note.
+id: holy-name-of-jesus-benedictus-antiphon
+text:
+  la: "Dedit se, * ut liberáret pópulum, et acquíreret sibi nomen ætérnum, allelúja."
+  en: "He gave himself * to deliver his people, and to get himself an everlasting Name, alleluia."
+status:
+  la: verified
+  en: verified

src/data/propers/temporal/holy-name-of-jesus-collect.yml

@@ -0,0 +1,17 @@
+# Read from web/www/horas/Latin/Tempora/Nat2-0.txt and its English
+# counterpart's own [Oratio].
+id: holy-name-of-jesus-collect
+text:
+  la: |
+    Orémus.
+    Deus, qui unigénitum Fílium tuum constituísti humáni géneris Salvatórem, et Jesum vocári jussísti: concéde propítius; ut, cujus sanctum nomen venerámur in terris, ejus quoque aspéctu perfruámur in cælis.
+    Per eúmdem Dóminum nostrum Jesum Christum Fílium tuum, qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
+    R. Amen.
+  en: |
+    Let us pray.
+    O God, who hast appointed thine Only-begotten Son to be the Saviour of mankind, and hast commanded that his Name should be called Jesus: mercifully grant that we who here on earth do worship that most holy Name may be made glad in heaven by his Presence.
+    Through the same our Lord Jesus Christ, thy Son, who liveth and reigneth with thee, in the unity of the Holy Spirit, God, world without end.
+    R. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/temporal/holy-name-of-jesus-magnificat-antiphon.yml

@@ -0,0 +1,10 @@
+# Read from web/www/horas/Latin/Tempora/Nat2-0.txt's own [Ant 1] (the
+# antiphon slotted between the day's [Versum 1] and [Oratio], i.e. First
+# Vespers' own Magnificat antiphon) and its English counterpart.
+id: holy-name-of-jesus-magnificat-antiphon
+text:
+  la: "Fecit * mihi magna qui potens est, et sanctum Nomen ejus, allelúja."
+  en: "He that is mighty * hath done to me great things, and holy is his Name, alleluia."
+status:
+  la: verified
+  en: verified