Improve the local GHSA/SYNC process

[jasnow]

My new/latest ruby-advisory-db sub-project:

GOAL: Go straight (no automated or manual steps) from the GHSA:SYNC (github_advisory_sync.rb) script to clean "yamllint" and green "rake" run.

TLDR: more shareable daily process (More automated and documented standards, less manual steps)

1. Most of these improvement would focus of reducing or eliminating the automated or manual post-processing (after github_advisory_sync.rb) of advisories.

   • I will be experimenting with removing the post-processing steps and see if "yamllint", "rake", and PR approval is affected.

2. Also documentation issues will be created to make new contributors aware of the normal expectations and conventions.

   • This include PR feedback items.

Finally, feel free to add other improvements to this issue's comments or write new issues/PRs.

You can assume that if an issue is created (vs. PR) that I need help with it.
Thanks