OSV-Scanner Github Action Tracker

[another-rex]

This is an issue to keep track of a list of todo's needed to complete the github action capability started in #432

• Change links that point to Recreated Github Action PR  #432 PR branch to point to main (and/or a tagged commit of main)
• Print out a link to the code scanning page as it's not clear results are shown there.
• Add support for annotations
• Add documentation (this is for later, as we want to dogfood it in our own repos first before broadcasting this widely)