Rename list commands

Rename permission-list and document-list to
permissions and documents, for consistency with
how we handle remotes. The old command names
are kept as hidden aliases.

Closes: #2131

Closes: #2366
Approved by: mwleeds
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Internal Server Error - Gitea: Git with a cup of tea
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f