docs: add command reference

[dboddie]

• Have you followed the guidelines for contributing?
• Have you signed the CLA?
• Have you successfully run make lint?
• Have you successfully run pytest tests/unit?

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CRAFT-1851

[codecov-commenter]

Codecov Report

Merging #4267 (6c826fb) into main (e57f979) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main    #4267   +/-   ##
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  Coverage   88.98%   88.98%           
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  Files         296      296           
  Lines       20192    20192           
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  Hits        17968    17968           
  Misses       2224     2224           

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[sergiusens]

can we get documentation builds as part of PRs?

[dboddie]

can we get documentation builds as part of PRs?

Yes, when the RTD docs builds are working. I think #4272 fixes breakage caused by an obsolete submodule.

[sergiusens]

I have merged the prereq, can you update this branch?

[dboddie]

I have merged the prereq, can you update this branch?

Can you take ownership of the Snapcraft RTD project? The webhook integration won't work properly for me, and I think it's because I don't have the correct permissions on this repo.