Add June Matins readings for SanctiM-track saints

12 of June's 13 SanctiM-track saints authored, including the major
Duplex I class feast of Ss. Peter and Paul. One left unsourced (the
Vigil of St. John the Baptist has only a Nocturn 1 scripture reading
in the source, nothing proper to author for Nocturn 2/3). Found a new
wrinkle: St. William Abbot has real vita content in both tracks,
essentially the same story independently transcribed — sourced from
the Tridentine file since only it has an English translation.

src/data/propers/nocturn-readings/ss-vitus-modestus-and-crescentia.yml

@@ -0,0 +1,58 @@
+# Matins Nocturn 2 reading for Ss. Vitus, Modestus, and Crescentia,
+# Martyrs (Jun 15) — SanctiM/06-15M.txt bases `@Sancti/06-15` (the
+# whole day, with no Nocturn 2/3 override) but narrows the Officium to
+# St. Vitus alone, the same "Monastic office narrows a joint feast"
+# pattern already seen for `ss-vincent-and-anastasius.yml`,
+# `ss-cletus-and-marcellinus.yml`, `ss-alexander-eventius-theodulus-and-juvenal.yml`,
+# and `ss-marcellinus-peter-and-erasmus.yml` — the full three-martyr
+# text is used here per vu-prefer-text-over-missing (see memory
+# vu-matins-pre1955-saints, vu-matins-sanctim-saints).
+# web/www/horas/Latin/Sancti/06-15.txt, English/Sancti/06-15.txt.
+# Single lesson (simplex-feast Lectio93), one continuous account, no
+# responsory given in the source.
+id: ss-vitus-modestus-and-crescentia
+readings:
+  - nocturn: 2
+    isGospel: false
+    text:
+      la: >-
+        Vitus admodum puer inscio patre baptizatus est: quod cum ille rescivisset, nihil
+        prætermisit, quo filium a christiana religione removeret. Qua in voluntate permanentem,
+        Valeriano judici verberibus castigandum tradidit. Sed nihilominus in sententia
+        persistens, patri redditus est. Sed dum eum pater gravius punire cogitat, Vitus Angeli
+        monitu, comitibus Modesto et Crescentia, ejus educatoribus, migrat in alienas terras:
+        ibique eam sanctitatis laudem adeptus est, ut ejus fama ad Diocletianum perlata, ipsum
+        imperator accerseret, ut filium suum a dæmone vexatum liberaret: Quo liberato, cum ei
+        amplissimis præmiis ingratus imperator, ut deos coleret, persuadere non potuisset, una
+        cum Modesto et Crescentia vinculis constrictum mittit in carcerem. Quos ubi
+        constantiores esse comperit, demitti jubet in ingens vas liquato plumbo, ferventi resina
+        ac pice plenum: in quo cum trium Hebræorum puerorum more divinos hymnos canerent, inde
+        erepti leoni objiciuntur: qui prostérnens se, eorum pedes lambebat. Quare inflammatus
+        ira imperator, quod multitudinem videbat miraculo commoveri, eos in catasta sterni jubet
+        et ita cædi eorum membra, atque ossa divelli. Quo tempore tonitrua, fulgura, magnique
+        terræmotus fuere, quibus templa deorum corruerunt, et multi oppressi sunt. Eorum
+        reliquias Florentia nobilis femina, unguentis conditas, honorifice sepelivit.
+      en: >-
+        This Vitus was a child who was baptized without his father's knowledge. When his father
+        had found it out, he used his best endeavours to dissuade his son from the Christian
+        religion, but as he found him persistent in it, he handed him over to Valerian the judge
+        to be whipped. But as he still remained as unshaken as before, he was given back to his
+        father. But while his father was turning over in his mind to what severe discipline to
+        subject him, Vitus, being warned by an Angel, fled out of the country, in company with his
+        foster-parents Modestus and Crescentia. In his new home he gained great praise for
+        holiness, so that the fame of it came to Diocletian, which Emperor sent for him to
+        deliver his own child which was vexed with a devil. Him Vitus delivered, but when the
+        Emperor found that with all his great gifts he could not bring him to worship the gods, he
+        had the ingratitude to cast him and Modestus and Crescentia into prison, binding them in
+        fetters. But when they were found in their prison more faithful than ever to their
+        confession, the Emperor commanded them to be thrown into a great vessel full of melted
+        lead, resin, and pitch. Therein these three, like the three Holy Children in the burning
+        fiery furnace, sang praise to God, and upon that they were haled forth and cast to a lion,
+        but he lay down before them, and licked their feet. Then the Emperor, being filled with
+        fury, more especially because he saw that the multitude that looked on were stirred up at
+        the miracle, commanded Vitus, Modestus, and Crescentia to be stretched upon a block and
+        their limbs crushed, and their bones rent one from the other. While as they were dying
+        there came great thunderings, and lightnings, and earthquakes, so that temples of the
+        gods fell down, and many men were killed. As for that which remained of the Martyrs, the
+        noble lady Florence took it, and embalmed it with spices, and honourably buried it.
+    status: { la: verified, en: verified }