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-responsory-st-matthias.yml

@@ -4,18 +4,18 @@ id: lauds-responsory-st-matthias
 text:
   la: |
     R.br. In omnem terram * Exívit sonus eórum.
-    ℟. In omnem terram * Exívit sonus eórum.
-    ℣. Et in fines orbis terræ verba eórum.
-    ℟. Exívit sonus eórum.
-    ℣. Glória Patri, et Fílio, * et Spirítui Sancto.
-    ℟. In omnem terram * Exívit sonus eórum.
+    R. In omnem terram * Exívit sonus eórum.
+    V. Et in fines orbis terræ verba eórum.
+    R. Exívit sonus eórum.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. In omnem terram * Exívit sonus eórum.
   en: |
     R.br. Their sound hath gone * forth into all the earth.
-    ℟. Their sound hath gone * forth into all the earth.
-    ℣. And their words unto the ends of the world.
-    ℟. Forth into all the earth.
-    ℣. Glory be to the Father, and to the Son, * and to the Holy Ghost.
-    ℟. Their sound hath gone * forth into all the earth.
+    R. Their sound hath gone * forth into all the earth.
+    V. And their words unto the ends of the world.
+    R. Forth into all the earth.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. Their sound hath gone * forth into all the earth.
 status:
   la: verified
   en: verified