Add Our Lady of Guadalupe (Dec 12)

Sourced from the reference engine's national-calendar file. Own proper
collect, Ant 1, and Matins Nocturn 2 narrative reading (Juan Diego's
apparition account), same scope as the Our Lady of Lourdes feast --
Common of the BVM (C11) carries the rest. No canonization-deflation
question here (an apparition title, cultus confirmed 1754/1910). At
Duplex she ties the Immaculate Conception octave's threshold on a
non-closing day, which favors the occurring saint, so she wins Dec 12
outright.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EwsZQMjALCvy7u9tFDWmuQ

src/data/propers/common/our-lady-of-guadalupe-collect.yml

@@ -0,0 +1,24 @@
+# Read directly from web/www/horas/Latin/Sancti/12-12n.txt's own [Oratio]
+# and its English counterpart.
+id: our-lady-of-guadalupe-collect
+text:
+  la: |
+    Orémus.
+    Deus, qui sub beatíssimæ Vírginis Maríæ singulári patrocínio constitútos perpétuis
+    benefíciis nos cumulári voluísti: præsta supplícibus tuis; ut, cujus hódie
+    commemoratióne lætámur in terris, ejus conspéctu perfruámur in cælis.
+    Per 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 placed us under the special patronage of the most Blessed Virgin
+    Mary, and hast been pleased to shower perpetual blessings upon us: grant to thy
+    suppliants; that, as we are brought joy on earth by the commemoration today, we may
+    enjoy her sight in heaven.
+    Through Jesus Christ, thy Son our Lord, Who liveth and reigneth with thee, in the
+    unity of the Holy Ghost, God, world without end.
+    R. Amen.
+status:
+  la: verified
+  en: verified