Normalize versicle notation to plain V./R. across propers

Unicode ℣/℟ (U+2123/U+211F) were mixed unpredictably with plain V./R.
across ~550 proper YAML files, sometimes within the same file. Screen
readers can't announce the unicode glyphs. Replace all instances with
plain text.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QC6jHsj75xcsTkapqJR6fD

src/data/propers/common/st-lucius-i-commemoration.yml

@@ -14,7 +14,7 @@ text:
     Orémus.
     Deus, qui nos beáti Lúcii Mártyris tui atque Pontíficis ánnua solemnitáte lætíficas: concéde propítius; ut, cujus natalítia cólimus, de ejúsdem étiam protectióne gaudeámus.
     Per Dóminum nostrum Jesum Christum, Fílium tuum: qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
-    ℟. Amen.
+    R. Amen.
   en: |
     Ant. He that hateth his life * in this world, shall keep it unto life eternal.
     V. The righteous shall flourish like the palm tree:
@@ -22,7 +22,7 @@ text:
     Let us pray.
     O God, who year by year dost gladden us by the solemn feast day of thy Blessed Martyr and Bishop Lucius, mercifully grant that we who keep his birthday, may ever feel the joyful effects of his protection.
     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.
+    R. Amen.
 status:
   la: draft
   en: draft