cli.argparser: nested argparse groups will be deprecated in python 3.11 #4648
Description
streamlink_cli currently defines nested argparse groups (as well as nested plugin args) for better organization in the docs:
- https://github.com/streamlink/streamlink/blob/4.2.0/src/streamlink_cli/argparser.py#L760-L762
- https://github.com/streamlink/streamlink/blob/4.2.0/src/streamlink_cli/main.py#L861-L864
- https://github.com/streamlink/streamlink/blob/4.2.0/docs/ext_argparse.py#L134-L148
- https://streamlink.github.io/cli.html#stream-transport-options
This needs to be changed and a different way needs to be found to have nested groups in the docs.