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/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