Add May sanctoral content: 10 saints plus the Queenship of the BVM

Continues the full-year sanctoral import (see TODO.md/memory for Jan-Apr):
St. Pius V, St. Antoninus, St. Robert Bellarmine, St. John Baptist de la
Salle, St. Paschal Baylon, St. Venantius, St. Bernardine of Siena, St. John
Baptist de Rossi, St. Augustine of Canterbury, St. Mary Magdalene de Pazzi,
and the Queenship of the BVM (May 31, Duplex II Classis, instituted by Pius
XII's 1954 "Ad cæli Reginam" — full proper content, not a Common fallback).

Adding the Queenship to May 31 surfaces a real collision with Trinity
Sunday in years where Trinity falls on May 31 (2026): since this app
models Trinitytide Sundays as plain ordinary-sunday with no special
first-class standing, a Duplex+ sanctoral feast wins outright there per
the existing precedence rule. Updated the two tests pinned to that date
accordingly, with a third moved to a Trinity Sunday date (2023-06-04)
free of any sanctoral entry to keep testing the octave-vs-anchor-day
interaction in isolation.

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

src/data/propers/common/st-john-baptist-de-la-salle-collect.yml

@@ -0,0 +1,27 @@
+# Read directly from web/www/horas/Latin/Sancti/05-15.txt's own
+# [Oratio] and its English counterpart.
+id: st-john-baptist-de-la-salle-collect
+text:
+  la: |
+    Orémus.
+    Deus, qui, ad christiánam páuperum eruditiónem et ad juvéntam in via veritátis
+    firmándam, sanctum Joánnem Baptístam Confessórem excitásti, et novam per eum in
+    Ecclésia famíliam collegísti: concéde propítius; ut ejus intercessióne et exémplo,
+    stúdio glóriæ tuæ in animárum salúte fervéntes, ejus in cælis corónæ partícipes
+    fíeri valeámus.
+    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 God, who didst raise up the Confessor, St. John Baptist, to promote the Christian
+    education of the poor and to strengthen the young in the way of truth, and, through
+    him, didst gather together a new family within thy Church, mercifully grant through
+    his intercession and example, that we may burn with zeal for thy glory, through the
+    salvation of souls, and may share his crown 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.
+    ℟. Amen.
+status:
+  la: verified
+  en: verified