[metaissue] Action items for going live

[webknjaz]

Stage 0

• [x] Put the repo with code under pypa (done by @pradyunsg)
• [x] Try convincing GitHub to enable Actions for pypa (and python, but that's not directly related)
  • Actions are enabled for PyPA org now.
  • ~This will probably not work for now — when I tried asking GH to enroll participants of my workshop they said that the waitlist is huge. But it looks like I can still publish this Action to the Marketplace.~
• [x] :heavy_check_mark: Do a security review of the Action (#14)

Stage 1: Once Warehouse supports tokens

• [x] Publish the Action to the Marketplace
• [x] Write the docs. (See #2 / https://github.com/pypa/packaging.python.org/pull/647)
• [x] Merge docs (See #2)
• [ ] Implement Action testing (this one may be challenging ATM. See #3)
• [ ] Keep improving the Action (#4)
• [ ] Monitor SO and other sources of complaints
• [ ] Keep it up with the latest best practices