In this branch, we originally avoided the authentication check by
getting rid of the run method attached to the command. Instead of that,
this commit makes the `gh actions` command runnable again, but the
authentication is disabled with `cmdutil.DisableAuthCheck`; this mirrors
what's done for `gh version`.
`gh actions` and `gh actions [-h | --help]` all work while being logged
out.
In addition, this commit restores some original behavior. Before this
commit, the help footer (usage, inherited flags, etc.) is appended
whether you use `gh actions` or `gh actions --help`. This commit
restores the original behavior where `gh actions` prints just the text
for the actions explanation, but `gh actions --help` appends the help
footer.
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