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/uk/libcosmic.ftl

@@ -1,36 +0,0 @@
-# Context Drawer
-close = Закрити
-# About
-license = Ліцензія
-links = Ланки
-developers = Розробники
-designers = Дизайнери
-artists = Художники
-translators = Перекладачі
-documenters = Документатори
-february = Лютий { $year }
-november = Листопад { $year }
-friday = П'ятниця
-tuesday = Вівторок
-may = Травень { $year }
-wednesday = Середа
-april = Квітень { $year }
-monday = Понеділок
-december = Грудень { $year }
-sunday = Неділя
-march = Березень { $year }
-june = Червень { $year }
-saturday = Субота
-august = Серпень { $year }
-july = Липень { $year }
-thursday = Четвер
-september = Вересень { $year }
-october = Жовтень { $year }
-january = Січень { $year }
-mon = Пн
-tue = Вт
-wed = Ср
-thu = Чт
-fri = Пт
-sat = Cб
-sun = Нд