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/vespers-responsory-purification.yml

@@ -6,18 +6,18 @@ id: vespers-responsory-purification
 text:
   la: |
     R.br. Ave María, grátia plena, * Dóminus tecum.
-    ℟. Ave María, grátia plena, * Dóminus tecum.
-    ℣. Benedícta tu in muliéribus, et benedíctus fructus ventris tui.
-    ℟. Dóminus tecum.
-    ℣. Glória Patri, et Fílio, * et Spirítui Sancto.
-    ℟. Ave María, grátia plena, * Dóminus tecum.
+    R. Ave María, grátia plena, * Dóminus tecum.
+    V. Benedícta tu in muliéribus, et benedíctus fructus ventris tui.
+    R. Dóminus tecum.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Ave María, grátia plena, * Dóminus tecum.
   en: |
     R.br. Hail Mary full of grace, * the Lord is with thee.
-    ℟. Hail Mary full of grace, * the Lord is with thee.
-    ℣. Blessed art thou among women, and blessed is the fruit of thy womb.
-    ℟. The Lord is with thee.
-    ℣. Glory be to the Father, and to the Son, * and to the Holy Ghost.
-    ℟. Hail Mary full of grace, * the Lord is with thee.
+    R. Hail Mary full of grace, * the Lord is with thee.
+    V. Blessed art thou among women, and blessed is the fruit of thy womb.
+    R. The Lord is with thee.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. Hail Mary full of grace, * the Lord is with thee.
 status:
   la: verified
   en: verified