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/regula/02-18.yml

@@ -0,0 +1,13 @@
+# Verified against Divinum Officium (Latin Regula, English translation).
+canonicalDate: "02-18"
+label:
+  la: "Régula Sancti Patri Nostri Benedícti. Caput 15: Alle­lúja quibus tempóribus dicátur"
+  en: "The Rule of our Holy Father Benedict. Chapter 15: In Which Seasons Alle­luia Is to Be Said"
+text:
+  la: |
+    A sanctum Pascha usque Pentecósten sine intermissióne dicátur Alle­lúja, tam in psalmis quam in responsóriis. A Pentecósten autem usque caput quadragésimæ, ómnibus noctis, cum sex posterióribus psalmis tantum ad Noctúrnos dicátur. Omni vero Domínica extra quadragésima cántica, Matutínos, Prima, Tértia, Sexta Nonáque cum Alle­lúja dicátur, Véspera vero jam antefána. Responsória vero numquam dicántur cum Alle­lúja, nisi a Pascha usque Pentecósten.
+  en: |
+    From the holy feast of Easter until Pentecost, without intermission, let Alle­luia be said both with the psalms and with the responsories. Every night from Pentecost until the beginning of Lent let it be said at Matins with the six latter psalms only. But on every Lord’s day outside Lent let canticles, Lauds, Prime, Terce, Sext and None be said with Alle­luia: Vespers however with antiphons: but responsories may never be said with Alle­luia, except from Easter to Pentecost.
+status:
+  la: verified
+  en: verified