v0.8.0

Add support for Matrix room aliases

- Update _find_room to resolve room aliases (starting with #)
- Use room_resolve_alias API to convert aliases to room IDs
- Fall back to name search if alias resolution fails
- Add comprehensive tests for alias resolution scenarios

Now you can use room aliases like '#admins:m-try.mindroom.chat' directly
instead of needing to know the room name or internal room ID.