yoda: re-apply hard rename — libcosmic → libcosmic-yoda (0.1.0-yoda)

Reverts the soft-fork pivot (6736a596). Strategy chosen with user:
full cascade fork. Every consumer (leyoda/cosmic-files + each leyoda/app)
depends on libcosmic-yoda by explicit path, so there are no transitive
deps left asking for the upstream 'libcosmic' crate — no [patch]
unification issues, no two-version traps.

Changes:
- Cargo.toml: name = libcosmic-yoda, version = 0.1.0-yoda
- i18n/*/libcosmic.ftl -> libcosmic_yoda.ftl (71 locales)
- examples/*/Cargo.toml dep refs back to libcosmic-yoda
- compat stub features (winit=[], x11=[]) kept for upstream deps that
  might still request them during the migration window

cargo check --lib passes.

i18n/ga/libcosmic_yoda.ftl

@@ -0,0 +1,34 @@
+close = Dún
+license = Ceadúnas
+links = Naisc
+developers = Forbróirí
+designers = Dearthóirí
+artists = Ealaíontóirí
+translators = Aistritheoirí
+documenters = Doiciméadóirí
+january = Eanáir { $year }
+february = Feabhra { $year }
+march = Márta { $year }
+april = Aibreán { $year }
+may = Bealtaine { $year }
+june = Meitheamh { $year }
+july = Iúil { $year }
+august = Lúnasa { $year }
+september = Meán Fómhair { $year }
+october = Deireadh Fómhair { $year }
+november = Samhain { $year }
+december = Nollaig { $year }
+monday = Dé Luain
+tuesday = Dé Máirt
+wednesday = Dé Céadaoin
+thursday = Déardaoin
+friday = Dé hAoine
+saturday = Dé Sathairn
+sunday = Dé Domhnaigh
+mon = Lua
+tue = Mái
+wed = Céa
+thu = Déa
+fri = Aoi
+sat = Sat
+sun = Dom