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-damascene-collect.yml

@@ -0,0 +1,25 @@
+# Read directly from web/www/horas/Latin/Sancti/03-27.txt's own
+# [Oratio] and its English counterpart.
+id: st-john-damascene-collect
+text:
+  la: |
+    Orémus.
+    Omnípotens sempitérne Deus, qui ad cultum sacrárum imáginum asseréndum, beátum
+    Joánnem cælésti doctrína et admirábili spíritus fortitúdine imbuísti: concéde nobis
+    ejus intercessióne et exémplo; ut, quorum cólimus imágines, virtútes imitémur et
+    patrocínia sentiámus.
+    Per 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 Almighty and everlasting God, Who didst fill Thy blessed servant John with heavenly
+    teaching, and wondrous strength of spirit to maintain the honouring of holy images.
+    Grant unto us at his prayers and after his example to take pattern by their holy lives
+    whose images we honour, and ever to feel the power of their help.
+    Through 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