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/pt-BR/libcosmic.ftl

@@ -1,36 +0,0 @@
-# Context Drawer
-close = Fechar
-# About
-license = Licença
-links = Links
-developers = Desenvolvedores
-designers = Designers
-artists = Artistas
-translators = Tradutores
-documenters = Documentadores
-january = Janeiro de { $year }
-february = Fevereiro de { $year }
-march = Março de { $year }
-april = Abril de { $year }
-may = Maio de { $year }
-june = Junho de { $year }
-july = Julho de { $year }
-august = Agosto de { $year }
-september = Setembro de { $year }
-october = Outubro de { $year }
-november = Novembro de { $year }
-december = Dezembro de { $year }
-monday = Segunda-feira
-tuesday = Terça-feira
-wednesday = Quarta-feira
-thursday = Quinta-feira
-friday = Sexta-feira
-saturday = Sábado
-sunday = Domingo
-mon = Seg
-tue = Ter
-wed = Qua
-thu = Qui
-fri = Sex
-sat = Sáb
-sun = Dom