Gitxray

* Added a Highlighted findings section to the HTML report. Special thanks to Viktor and Darin from DevOps Paradox for their feedback.
* Added to every table in the HTML report the ability to collapse and expand.
* Merged the finding on similar repository names with the finding on the repository being the most starred.
* Improved the introduction section of the HTML report to guide users with sample use-cases for Gitxray.

* Fixed parsing of legacy workflows which include an empty path attribute.
* Fixed parsing of broken armored PGP keys which appear to be accepted by GitHub when being added to a user's profile.

* Added a new "--shush" parameter which turns "shushable" mode on, discarding any progress output from stdout.
* Added a new finding under the "personal" category which tells if the contributor has enabled "Available for hire" in their profile (docs describe it here: https://docs.github.com/en/account-and-profile/setting-up-and-managing-your-personal-account-on-github/managing-user-account-settings/about-available-for-hire)
* Added a "WARNING" label/prefix on a couple of Workflow findings which deserve an extra highlight.
* Turned gh_api into a class named GitHubRESTAPI which stores a reference to gx_output.
* Added a new stdout method in gx_output to act as a proxy for print() calls, discarding "shushable" output.

* Fixed an error case (an unhandled exception) that showed up when scanning repositories with a very large list of contributors (e.g. torvalds/linux, or MicrosoftDocs/azure-docs), which leads to GitHub REST APIs responding in an undocumented manner, stating that: "The history or contributor list is too large to list contributors for this repository via the API".

* Fixed an error case that should be fixed in gh_api.py eventually: GitHub returning unexpected error responses when querying for certain releases while being unauthenticated. Thank you once again fearcito for your input and testing.

* Only showing "updated at" for comments if the created_at and updated_at field values differ. This helps place focus on updated comments which could potentially reveal a contributor trying to hide a past comment. GitHub is kind to show an Edit history for said comments as a menu option next to the comment itself.