propers: transcribe Lauds' fixed and weekday content

Every fixed and weekday-variable text Lauds needs beyond the psalms/
canticles themselves: per-weekday antiphons (data/hours/lauds-
antiphons.yml, reconstructed with an embedded '*' from the engine's
separately-rendered incipit/full lines), the weekday capitulum/
responsory/hymn/versicle bundle (shared verbatim Mon-Fri for the
capitulum, confirmed against the live engine), the fixed Benedictus
text, the Kyrie/Pater-noster short litany, the four Tridentine
suffrages, the conclusio, and the closing versicle.

Saturday's hymn is left honestly `missing`: every ordinary-time
Saturday is either Marian-Sabbato-overridden or falls in a privileged
season whose hymn is itself swapped for the season's own, so there's
no achievable date showing a genuinely per-annum, unprivileged
Saturday Lauds hymn to source it from.

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

src/data/propers/common/lauds-hymn-saturday.yml

@@ -0,0 +1,12 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), Lauds live query.
+# Every ordinary-time Saturday is either Marian-Sabbato-overridden or
+# falls in a privileged season (Lenten/Advent Ember Saturday) whose hymn is
+# itself swapped for the season's own -- there's no achievable date that
+# shows a genuinely per-annum, unprivileged Saturday Lauds hymn. Left
+# missing rather than presenting a season-specific hymn as if it were the
+# plain weekday default.
+id: lauds-hymn-saturday
+text: {}
+status:
+  la: missing
+  en: missing