bakery already fully covers what the PKGBUILD provided (binary, dependency
declarations) except a LICENSE copy, which bakery.toml's new license_file
field now closes. Removes packaging/arch/ and .forgejo/workflows/package.yml;
adds the LICENSE artifact to each release/dev-release/beta-release
workflow's prepare step. Not pacman-installed inside BOS today (BOS already
consumes these apps exclusively via build-local.sh's skel-staging), so this
only removes the option to `pacman -S` outside of BOS/bakery.
- Cargo.toml: depend on bread-theme (path dep for local dev, git dep for
production) with gtk feature; remove local theme dependencies
- src/theme.rs: replace local pywal/Catppuccin impl with bread_theme::gtk
helpers; local bar-specific CSS is preserved
- bakery.toml: describes breadbar for bakery install
- release.yml: builds on hestia self-hosted runner, publishes binary to
dl.breadway.dev and GitHub Releases on v* tags