feat: ability to turn off comment header and footer

[pkuczynski]

• action config updated
• report generation updated
• deleting previous comment
• readme updated

[pkuczynski]

@ahmadnassri what do you think?

[ahmadnassri]

I was planning on updating the logic to "update-in-place" for the comment (vs. remove-stale) which would require at least the footer to use (to locate which comment to update)

[pkuczynski]

This could be also achieved by hiding reference in a markdown comment. It will be findable bia the code but not rendered to the user.