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/fi/libcosmic_yoda.ftl

@@ -0,0 +1,34 @@
+monday = Maanantai
+mon = ma
+tuesday = Tiistai
+tue = ti
+wednesday = Keskiviikko
+wed = ke
+thursday = Torstai
+thu = to
+friday = Perjantai
+fri = pe
+saturday = Lauantai
+sat = la
+sunday = Sunnuntai
+sun = su
+close = Sulje
+license = Lisenssi
+links = Linkit
+developers = Kehittäjät
+designers = Suunnittelijat
+artists = Artistit
+translators = Kääntäjät
+documenters = Dokumentoijat
+january = Tammikuu { $year }
+february = Helmikuu { $year }
+march = Maaliskuu { $year }
+april = Huhtikuu { $year }
+may = Toukokuu { $year }
+june = Kesäkuu { $year }
+july = Heinäkuu { $year }
+august = Elokuu { $year }
+september = Syyskuu { $year }
+october = Lokakuu { $year }
+november = Marraskuu { $year }
+december = Joulukuu { $year }