Support python direct call _parse_args or run

[zoumingzhe]

For example:

>>> from podman_compose import podman_compose
>>> podman_compose._parse_args(['version'])
>>> podman_compose.run(['help'])

[zoumingzhe]

podman-compose does not provide api, this is an easy way for python to run podman-compose commands

[zoumingzhe]

@muayyad-alsadi Can you help review and merge it? Thanks.

[p12tic]

Looks like this got merged via https://github.com/containers/podman-compose/pull/1000. Sorry for missing this PR and making you wait.