naming: localise liturgical day names in any language

Add internal/naming, which renders temporal day names and celebration
display names from the calendar engine's slugs in any language. English is
the built-in baseline; a language is data -- an embedded lang/<code>.ini
(pl shipped) and/or a user file at <config dir>/names/<code>.ini that
overrides it key by key. Names compose from a small vocabulary plus
per-language format templates, so word order and grammatical case can
differ (e.g. Polish genitive "3. Niedziela Okresu Zwykłego"); any string a
language omits falls back to English.

- Move day-name generation out of calendar (calendar.HumanizeSlug removed,
  calendar stays a pure engine) into naming.DayName; the English golden
  cases carry over verbatim.
- naming.CelebrationName unifies the three duplicated resolvers
  (cli/readings/calfeed): name.<lang> -> English -> Latin -> humanized slug.
  Saint names stay in the calendar data (name.<lang>), overridable via
  calendar layers.
- config: ui_language now accepts any code (lower-cased, not clamped to
  en/pl) so names/<code>.ini applies; UI chrome still resolves en/pl and
  falls back to English. Add NamesDir(); wire naming.SetUserDir (and the
  previously unwired bible.SetUserCorporaDir) in the TUI and web mains too,
  so external corpora and name files work across all three binaries.

1 files changed, 101 insertions, 0 deletions

diff --git a/internal/naming/lang/pl.ini b/internal/naming/lang/pl.ini
new file mode 100644
index 0000000..f7a3217
--- /dev/null
+++ b/internal/naming/lang/pl.ini
@@ -0,0 +1,101 @@
+# Polish (pl) temporal day names for lectio.
+#
+# This file overrides the built-in English baseline key by key: anything left
+# out falls back to English. Copy it to <config dir>/names/pl.ini to customise,
+# or use it as a template for another language (<config dir>/names/<code>.ini,
+# then set ui_language = <code>). Placeholders in [templates]:
+#   {ord}  ordinal (see [ordinal])     {wd}    weekday (see [weekdays])
+#   {season} season name (see below)   {prep}  preposition (see [season_prep])
+#   {day}  day-of-month number         {month} month name (see [months])
+# Season names are given in the genitive case Polish uses after "Niedziela"/
+# "tygodnia", so no linking preposition is needed ([season_prep] left empty).
+
+[templates]
+sunday          = {ord} Niedziela {season}
+weekday         = {wd} {ord} tygodnia {season}
+weekday_no_week = {wd} {season}
+octave_easter   = {wd} w Oktawie Wielkanocnej
+after_ashes     = {wd} po Środzie Popielcowej
+holy_week       = {wd} Wielkiego Tygodnia
+after_epiphany  = {wd} po Objawieniu Pańskim
+ember           = {wd} suchych dni {season}
+passion_week    = {wd} Tygodnia Męki Pańskiej
+date            = {day} {month}
+
+[ordinal]
+format = %d.
+
+[weekdays]
+mon = Poniedziałek
+tue = Wtorek
+wed = Środa
+thu = Czwartek
+fri = Piątek
+sat = Sobota
+sun = Niedziela
+
+[months]
+1  = stycznia
+2  = lutego
+3  = marca
+4  = kwietnia
+5  = maja
+6  = czerwca
+7  = lipca
+8  = sierpnia
+9  = września
+10 = października
+11 = listopada
+12 = grudnia
+
+[seasons]
+ordinary             = Okresu Zwykłego
+advent               = Adwentu
+lent                 = Wielkiego Postu
+easter               = Okresu Wielkanocnego
+septuagesima         = Przedpościa
+passiontide          = Męki Pańskiej
+time-after-pentecost = po Zesłaniu Ducha Świętego
+time-after-epiphany  = po Objawieniu Pańskim
+september            = września
+
+[season_prep]
+ordinary             =
+advent               =
+lent                 =
+easter               =
+septuagesima         =
+passiontide          =
+time-after-pentecost =
+time-after-epiphany  =
+september            =
+
+[named]
+triduum-thu     = Wielki Czwartek
+triduum-fri     = Wielki Piątek
+triduum-sat     = Wielka Sobota
+maundy-thursday = Wielki Czwartek
+good-friday     = Wielki Piątek
+holy-saturday   = Wielka Sobota
+palm-sunday     = Niedziela Palmowa
+passion-sunday  = Niedziela Męki Pańskiej
+low-sunday      = 2. Niedziela Wielkanocna
+trinity-sunday  = Uroczystość Najświętszej Trójcy
+trinity         = Niedziela Trójcy Świętej
+corpus-christi  = Najświętszego Ciała i Krwi Chrystusa
+sacred-heart    = Najświętszego Serca Pana Jezusa
+christ-the-king = Jezusa Chrystusa Króla Wszechświata
+easter-sunday   = Niedziela Zmartwychwstania Pańskiego
+pentecost       = Zesłanie Ducha Świętego
+ascension       = Wniebowstąpienie Pańskie
+holy-family     = Świętej Rodziny: Jezusa, Maryi i Józefa
+baptism-of-the-lord = Chrzest Pański
+epiphany        = Objawienie Pańskie
+christmas       = Narodzenie Pańskie
+nativity        = Narodzenie Pańskie
+circumcision    = Obrzezanie Pańskie
+ash-wednesday   = Środa Popielcowa
+ascension-vigil = Wigilia Wniebowstąpienia
+pentecost-vigil = Wigilia Zesłania Ducha Świętego
+christmas-sunday-sun = 2. Niedziela po Narodzeniu Pańskim
+mary-mother-of-god-octave-of-christmas = Świętej Bożej Rodzicielki Maryi