propers: add June's collect and antiphon text

Real collect text for all 16 June saints that have one, plus a real
antiphon for 4 of them and a fifth (Ss. Peter and Paul) that deliberately
reuses the Chair-of-Peter-at-Antioch antiphon text, matching the source's
own cross-reference — same extraction method as prior months.

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

src/data/propers/common/ss-vitus-modestus-and-crescentia-collect.yml

@@ -0,0 +1,18 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617) — read
+# directly from the reference engine's own real-date output (2035-06-15).
+# Same convention as data/propers/temporal/*-collect.yml.
+id: ss-vitus-modestus-and-crescentia-collect
+text:
+  la: |
+    Orémus.
+    Da Ecclésiæ tuæ, quǽsumus, Dómine, sanctis Martýribus tuis Vito, Modésto atque Crescéntia intercedéntibus, supérbe non sápere, sed tibi plácita humilitáte profícere: ut, prava despíciens, quæcúmque recta sunt, líbera exérceat caritáte.
+    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 Lord, we pray thee to grant unto thy Church through the prayers of thine Holy Martyrs Vitus, Modestus, and Crescentia, to mind not high things, but in all lowliness to do ever such things as be pleasing in thy sight, looking down upon all such things as be corrupt, and working ever in love unfeigned such things as be righteous.
+    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