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/ru/libcosmic_yoda.ftl

@@ -0,0 +1,34 @@
+close = Закрыть
+license = Лицензия
+links = Ссылки
+developers = Разработчики
+designers = Дизайнеры
+artists = Художники
+translators = Переводчики
+documenters = Авторы документации
+january = Январь { $year }
+february = Февраль { $year }
+march = Март { $year }
+april = Апрель { $year }
+may = Май { $year }
+june = Июнь { $year }
+july = Июль { $year }
+august = Август { $year }
+september = Сентябрь { $year }
+october = Октябрь { $year }
+november = Ноябрь { $year }
+december = Декабрь { $year }
+monday = Понедельник
+tuesday = Вторник
+wednesday = Среда
+thursday = Четверг
+friday = Пятница
+saturday = Суббота
+sunday = Воскресенье
+mon = Пн
+tue = Вт
+wed = Ср
+thu = Чт
+fri = Пт
+sat = Сб
+sun = Вс