Arena-py

Changed
- Revert using orjson library.

Changed
- Use orjson library for faster JSON parsing.

Added
- Attribute `jitsi-video`.
- MQTT CLI pub/sub scripts: `arena-py-pub` and `arena-py-sub`.

Changed
- Remove local objects when receiving `delete` message.
- MQTT CLI auto-generates topic from `object_id` when undefined.

Added
- Auth scripts: `arena-py-signout` and `arena-py-permissions`.
- Ability to request video token.

Changed
- Improved auto-detect signout when server changes.

Changed
- Google OAuth localhost flow restored.

Changed
- Google OAuth localhost flow removed, replaced with console flow.