Switches ort from load-dynamic to rocm feature so the ROCm execution
provider is compiled in. Adds rocm-runtime to bakery system_deps so
bakery doctor/install can verify it's present.
- breadpad-shared/Cargo.toml: depend on bread-theme (no gtk feature needed
in the shared crate)
- breadpad-shared/src/theme.rs: re-export Palette and load_palette from
bread-theme; retain all breadpad-specific CSS in build_css()
- bakery.toml: describes breadpad for bakery install
- release.yml: builds on hestia self-hosted runner, publishes binaries to
dl.breadway.dev and GitHub Releases on v* tags
