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/st-leo-ii.yml

@@ -0,0 +1,64 @@
+# Matins Nocturn 2 reading for St. Leo II, Pope, Confessor (Jun 28 on
+# this app's own calendar) — an off-date sourcing case like St. Paul
+# the Hermit in the pre-1955 pass (memory vu-matins-pre1955-saints):
+# the general Tridentine calendar keeps Leo II on Jul 3 instead
+# (`Sancti/07-03.txt`). The suffixed `Sancti/06-28t.txt` at this app's
+# own date simply redirects there (`@Sancti/07-03`). No genuine
+# SanctiM match at either date: the only SanctiM file for Jun 28,
+# `SanctiM/06-28oct.txt`, is an unrelated day within the Nativity of
+# St. John the Baptist's own octave — a missed pre-1955-pool candidate
+# rather than a genuine SanctiM case (see memory vu-matins-sanctim-saints).
+# web/www/horas/Latin/Sancti/07-03.txt, English/Sancti/07-03.txt.
+# Lectio4-6 combined into one reading, one continuous vita, no genuine
+# source break. No responsory given in the source.
+id: st-leo-ii
+readings:
+  - nocturn: 2
+    isGospel: false
+    text:
+      la: >-
+        Leo secúndus, Póntifex máximus, Sículus, humánis et divínis lítteris Græce et Latíne
+        doctus, músicis étiam erudítus fuit; ipse enim sacros Hymnos et Psalmos in Ecclésia ad
+        concéntum meliórem redúxit. Probávit acta sextæ Synodi, quæ Constantinópoli celebráta
+        est, præsidéntibus legátis apostólicæ Sedis, præsénte quoque Constantíno imperatóre, et
+        duobus patriárchis, Constantinopolitáno et Antiochéno, ac centum septuagínta epíscopis;
+        quam et in Latínum tránstulit.
+
+
+        In eo concílio Cyrus, Sergius et Pyrrhus condemnáti sunt, unam tantúmmodo voluntátem et
+        operatiónem in Christo prædicántes. Hic fregit supérbiam antístitum Ravennátum, qui,
+        exarchórum freti poténtia, Sedi apostólicæ non obtemperábant. Quam ob rem decrévit ut
+        eléctio cleri Ravennátis írrita esset, nisi Románi Pontíficis auctoritáte comprobarétur.
+
+
+        Vere pater páuperum fuit; non enim pecúnia solum, sed opera, labóre et consíliis,
+        egéntium viduárum et pupillórum inópiam ac solitúdinem sublevábat. Qui, dum síngulos non
+        magis prædicatióne quam vita ad pie sanctéque vivéndum adhortarétur, obdormívit in
+        Dómino mense sui pontificátus undécimo, quinto Nonas Julii, sepultúsque est in basílica
+        sancti Petri. Ordinatióne una, mense Júnio, creávit presbýteros novem, diáconos tres,
+        epíscopos divérsis in locis vigínti tres.
+      en: >-
+        Leo II was a Sicilian. He was learned in sacred and worldly letters in the Greek and
+        Latin tongues, and was moreover an excellent musician. He re-arranged and improved the
+        music of the sacred hymns and Psalms used in the Church. He approved the acts of the
+        sixth general Council, which was held at Constantinople, under the Presidency of the
+        Legates of the Apostolic See, in the presence of the Emperor Constantine, the Patriarchs
+        of Constantinople and Antioch, and one hundred and seventy Bishops. Leo also translated
+        the decrees of the Council from Greek into Latin.
+
+
+        It was in this Council that Cyrus, Sergius, and Pyrrhus were condemned for teaching that
+        there is in Christ only one Will and one Working. Leo broke the pride of the Archbishops
+        of Ravenna, who had puffed themselves up under the power of the Exarchs to set at naught
+        the power of the Apostolic See. Wherefore he decreed that the elections of the clergy of
+        Ravenna should be nothing worth, until they had been confirmed by the authority of the
+        Bishop of Rome.
+
+
+        He was a very father to the poor. Not by money only, but by his work, his labours, and
+        his advice he relieved the poverty and loneliness of widows and orphans. He was leading
+        all to live holy and godly lives, not by mere preaching, but by his own life, when he fell
+        asleep in the Lord, having sat as Pope nine months and twenty-seven days. He was buried in
+        the Church of St. Peter. In the month of June he held one ordination whereat he ordained
+        nine Priests, three Deacons, and twenty-three Bishops for diverse places.
+    status: { la: verified, en: verified }