Author All Saints' own proper Matins invitatory antiphon

Nov 1 fell through to the generic ferial invitatory antiphon instead of
its own proper text, since neither a matins-invitatory-all-saints.yml
override nor a real Common category existed to catch it. Sourced from
the reference engine's secular Sancti/11-01.txt [Invit] (the Monastic
SanctiM file has no override of its own here).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LGsATZvfnpQ81HQuoF5JuL

src/data/propers/common/matins-invitatory-all-saints.yml

@@ -0,0 +1,10 @@
+# Read from web/www/horas/Latin/Sancti/11-01.txt's own [Invit] (the
+# Monastic SanctiM/11-01.txt has no override of its own, so the secular
+# Sancti text is what actually governs here) and English/Sancti/11-01.txt.
+id: matins-invitatory-all-saints
+text:
+  la: "Regem regum Dóminum veníte adorémus: * Quia ipse est coróna Sanctórum ómnium."
+  en: "O come, let us worship the Lord, the King of kings, * for He is Himself the Crown of all the Saints."
+status:
+  la: verified
+  en: verified