rename: libcosmic → libcosmic-yoda (fork 0.1.0-yoda)

Fork point: pop-os/libcosmic 1.0.0 + perf/quickwins-bundle + macOS
window controls feature. From here the crate diverges under the yoda
lineage with its own versioning.

Changes:
- Cargo.toml: name = libcosmic-yoda, version = 0.1.0-yoda
- [lib] name = cosmic kept unchanged — consumer code still does 'use cosmic::...'
- examples/*/Cargo.toml: updated all libcosmic dep references to libcosmic-yoda
- i18n/*/libcosmic.ftl renamed to libcosmic_yoda.ftl (71 locales) to match
  the new name expected by fluent_language_loader!() macro

cargo check --lib passes. Examples not yet validated — Phase 2 (Wayland-only
cut) will rework them anyway.

i18n/ga/libcosmic.ftl

@@ -1,34 +0,0 @@
-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