feat: more automated awesome-ipfs PRs

[SgtPooki]

What kind of PR is this?

Select only one to speed up review/approval; i.e., don't lump an addition and a removal into a single PR.

• [N/A] Adding something new to awesome-ipfs
• [N/A] Editing something already listed on awesome-ipfs
• [N/A] Removing something from awesome-ipfs
• Something else (if so, please explain in the "Additional details" section below)

Pre-submit checklist

Please confirm ALL of the following before submitting your PR.

• [N/A] This PR includes only one addition, removal, or edit.
• [N/A] I edited the /data directory instead of the README.md.
• I reviewed the content policy and the and the IPFS Community Code of Conduct to ensure my submission meets the requirements.
• I have followed the CONTRIBUTING.md guidelines.

Additional details

Is there anything else we should know about this PR?

This PR is a part of addressing concerns raised in #420 and elsewhere, and adds the following features:

• Automatically update README.md for users. All they need to do to contribute is modify the data/** files.
• Runs awesome_bot via github actions instead of via circleci
• Posts comment to PRs giving insight into what was changed.
  • If .github/** was changed, a regular message will be displayed.
  • If data/** was changed
    • A message will be displayed indicating the YAML data has been edited.
    • If there are broken links, danger-js will fail the PR
  • If src/** was changed, a warning will be displayed
  • If scripts/** was changed, a warning will be displayed

See SgtPooki#2 for an example of what these changes do. You can look at the edit history for SgtPooki#2 (comment) to see the different types of messages.

[SgtPooki]

replaced by #429