Add the Most Holy Name of Jesus (Jan 2) as a proper temporal feast

Historically a floating Sunday (Jan 2-5, fixed to Jan 2 when no Sunday
falls there); per direct instruction this is instead fixed to Jan 2
every year for simplicity. Adds the feast's collect, Magnificat/
Benedictus antiphons, full Lauds psalmody, capitulum, the three-part
"Jesu dulcis memoria" hymn cycle (Vespers/Matins/Lauds), the Invitatory
antiphon, versicles, and two Matins nocturn readings (both St. Bernard
of Clairvaux), sourced from Tempora/Nat2-0.txt. Reuses the `fixed-date`
anchor kind added in the prior commit.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014axryJBrRswYh2niA7WCUc

src/data/propers/common/lauds-hymn-holy-name-of-jesus.yml

@@ -0,0 +1,61 @@
+# Read from web/www/horas/Latin/Tempora/Nat2-0.txt's own [Hymnus Laudes]
+# ("Jesu, decus angélicum") and its English counterpart -- the third of
+# the three-part "Jesu dulcis memoria" hymn cycle (see the -matins- and
+# -vespers- sibling files for the other two parts).
+id: lauds-hymn-holy-name-of-jesus
+text:
+  la: |
+    Jesu, decus angélicum,
+    In aure dulce cánticum,
+    In ore mel miríficum,
+    In corde nectar cǽlicum.
+
+    Qui te gustant, esúriunt;
+    Qui bibunt, adhuc sítiunt;
+    Desideráre nésciunt,
+    Nisi Jesum, quem díligunt.
+
+    O Jesu mi dulcíssime,
+    Spes suspirántis ánimæ!
+    Te quærunt piæ lácrimæ,
+    Te clamor mentis íntimæ.
+
+    Mane nobíscum, Dómine,
+    Et nos illústra lúmine;
+    Pulsa mentis calígine,
+    Mundum reple dulcédine.
+
+    Jesu, flos Matris Vírginis,
+    Amor nostræ dulcédinis,
+    Tibi laus, honor nóminis,
+    Regnum beatitúdinis.
+    Amen.
+  en: |
+    O Jesu, thou the beauty art
+    Of angel worlds above;
+    Thy Name is music to the heart,
+    Enchanting it with love.
+
+    Celestial sweetness unalloyed,
+    Who eat thee hunger still;
+    Who drink of thee still feel a void,
+    Which naught but thou canst fill.
+
+    O my sweet Jesu, hear the sigh
+    Which unto thee I send;
+    To thee mine inmost spirit cries,
+    My being's hope and end.
+
+    Stay with us, Lord, and with thy light
+    Illume the soul's abyss;
+    Scatter the darkness of our night,
+    And fill the world with bliss.
+
+    O Jesu, spotless Virgin's flower,
+    Our life and joy art thou;
+    To thee be praise, and might, and power,
+    Through all eternity.
+    Amen.
+status:
+  la: verified
+  en: verified