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/common/st-john-capistrano-collect.yml

@@ -0,0 +1,25 @@
+# Read directly from web/www/horas/Latin/Sancti/03-28.txt's own
+# [Oratio] and its English counterpart.
+id: st-john-capistrano-collect
+text:
+  la: |
+    Orémus.
+    Deus, qui per beátum Joánnem fidéles tuos in virtúte sanctíssimi nóminis Jesu de
+    crucis inimícis triumpháre fecísti: præsta, quǽsumus; ut, spirituálium hóstium, ejus
+    intercessióne, superátis insídiis, corónam justítiæ a te accípere mereámur.
+    Per eúndem Dóminum nostrum Jesum Christum, Fílium tuum: qui tecum vivit et regnat in
+    unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
+    ℟. Amen.
+  en: |
+    Let us pray.
+    O God, Who by Thy blessed servant John didst cause Thy faithful people, through the
+    power of the most Holy Name of Jesus, to prevail against the enemies of His Cross,
+    grant unto us, we beseech Thee, the help of the prayers of the same Thy servant that
+    we may prevail against our ghostly enemies, and may be made worthy to receive from
+    Thee a crown of righteousness.
+    Through the same Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in
+    the unity of the Holy Ghost, God, world without end.
+    ℟. Amen.
+status:
+  la: verified
+  en: verified