Release v0.30.1: Fix nested scene items in groups

- Fix toggle and other scene item commands to properly handle nested sources within groups
- Support Group/SourceName syntax for all scene item operations
- Resolves issue #91

upd TODO.md for eventual future roadmap

Release v0.20.3

chore: bump version to 0.20.2

chore: bump version to 0.20.1

chore: bump version to 0.20.0

Bump v0.19.2

CI: platform supported debian-latest, ubuntu-latest, macos-latest, wi…

…ndows-latest

feat: update deps and bump version to 0.19.0

docs: updated doc comment