pulp-cli docs known plugins need updating.

[fkuep]

Summary

The main project tries to curate a list of known pulp-cli plugins:

• pulp/pulpproject.org@00e6a44

You do that too:
https://github.com/pulp/pulp-cli/blob/main/docs/index.md?plain=1#L19-L21

I would like You to:

• update Yours with at least the known plugins from aforementioned commit.
• inform melcorr in "Plugin features" on pulpproject.org do not clearly reflect plugin features. pulpproject.org#361 that she can instead trustingly refer to https://docs.pulpproject.org/pulp_cli/ because If You don't know it, how should she?