Prime: real content (psalms, Martyrology, Regula) and ordo corrections

Pulls in verified content from Divinum Officium rather than placeholders:
17 psalms (2, 6, 7-19, 118, 129), 365 days of the Martyrology, and the full
121-reading Regula cycle, plus the Athanasian Creed.

Ordo corrections driven by review against the real engine output:
- Capitulum and Preces now pick a Sunday/feast vs. ferial form
  (calendar/isSundayOrFeast); ferial Preces said every ferial day by choice.
- Chapter responsory, hymn doxology, and the opening versicle's
  Alleluia/Laus tibi all vary by season via a shared resolver
  (hours/seasonal-propers.ts).
- Real Roman Kalends/Nones/Ides Latin dating (calendar/roman-date.ts,
  verified against 363/365 real Martyrology headings) plus the historical
  "bis sextus" Feb 29 handling, and the Martyrology's Luna (moon-day)
  heading (a ported Golden-Number calculation).
- Fixed responsory structure (was missing its initial full repeat),
  weekday psalm antiphons (opening as incipit-or-full by rank, full
  repeat after the psalms/Creed as its own part, "*" chant mark kept),
  scripture citations on the capitulum/lectio brevis, and V./R. markers
  switched from Unicode symbols to plain text for reliable font rendering.
- Dropped Pretiosa and the dead-commemoration psalm (129) for time;
  trimmed section headings down to the ones that are actually named
  things (Preces, Chapter Office, etc. no longer relabel connective text).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/data/hours/prime-antiphons.yml

@@ -0,0 +1,27 @@
+# Verified against Divinum Officium ("Psalmi minor.txt", [Monastic_]
+# section, both languages). One antiphon per weekday, framing that day's
+# whole psalm group. Each string carries its own incipit/full split via an
+# embedded "*" (same convention as the source) — see hours/antiphon.ts for
+# how that's used: incipit (or full, on a Double-or-higher feast) before the
+# first psalm, full text always after the last.
+sunday:
+  la: "Allelúja, * allelúja, allelúja (allelúja)."
+  en: "Alleluia, * alleluia, alleluia (alleluia)."
+monday:
+  la: "Servíte Dómino * in timóre: et exsultáte ei cum tremóre."
+  en: "Serve ye the Lord with fear: * and rejoice unto him with trembling."
+tuesday:
+  la: "Deus judex justus, * fortis et longánimis: numquid irascétur per síngulos dies?"
+  en: "God is a just judge * strong and patient, will He be angry every day?"
+wednesday:
+  la: "Exsúrge, Dómine * non præváleat homo."
+  en: "Arise, O Lord, * let not man be strengthened."
+thursday:
+  la: "Cantábo Dómino, * qui bona tríbuit mihi."
+  en: "I shall sing to the Lord, * who hath given good things to me."
+friday:
+  la: "Bonórum meórum * non indiges, in te sperávi, consérva me, Dómine."
+  en: "Thou hast no need of my goods * preserve me, O Lord, for I have put my trust in thee."
+saturday:
+  la: "Vivit Dóminus, * et benedíctus Deus salútis meæ."
+  en: "The Lord liveth, and blessed be my God, my salvation."