hours: build Terce, Sext, and None

Three separate resolver files (terce.ts/sext.ts/none.ts), not a shared
little-hour module — they're structurally identical but kept independent
by choice. Ordo verified against Divinum Officium (Monastic Tridentinum
1617): opening versicle, self-contained hymn, one antiphon framing three
psalms (no closing repeat, unlike Prime), a capitulum with its own
embedded short versicle/response, the day's own collect, and a closing
identical across all three hours.

Also fills in psalter-distribution.yml's previously-missing Sunday/
Monday/Tuesday psalm entries (Ps 118 sections for Sunday/Monday; Tuesday
turns out to share Wednesday/Thursday's native gradual-psalm set, not a
distinct one). Friday/Saturday's antiphons are derived from each day's
first psalm rather than reusing the native gradual antiphons, since
those two days already use a redistributed, non-native psalm set.

hours/types.ts gains a 'day-collect' part kind — the first ordo to use
the day's own Proper collect rather than a fixed text.

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

src/data/propers/common/sext-capitulum-per-annum.yml

@@ -0,0 +1,13 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), clean
+# per-annum run (2026-08-31). See terce-capitulum-per-annum.yml for the
+# combined-block structure note and the deferred-seasonal-variant caveat.
+id: sext-capitulum-per-annum
+text:
+  la: "Alter altérius ónera portáte, et sic adimplébitis legem Christi. R. Deo grátias. V. Dóminus regit me, et nihil mihi déerit. R. In loco páscuæ ibi me collocávit."
+  en: "Bear ye one another's burdens; and so you shall fulfill the law of Christ. R. Thanks be to God. V. The Lord ruleth me: and I shall want nothing. R. He hath set me in a place of pasture."
+citation:
+  la: "Gal. 6:2"
+  en: "Gal. 6:2"
+status:
+  la: verified
+  en: verified