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/lauds-versicle-annunciation.yml

@@ -5,11 +5,11 @@
 id: lauds-versicle-annunciation
 text:
   la: |
-    ℣. Ave, María, grátia plena.
-    ℟. Dóminus tecum.
+    V. Ave, María, grátia plena.
+    R. Dóminus tecum.
   en: |
-    ℣. Hail, Mary, full of grace.
-    ℟. The Lord is with thee.
+    V. Hail, Mary, full of grace.
+    R. The Lord is with thee.
 status:
   la: verified
   en: verified