Migration to composite GH Action and facing rate limits

[miroslavpojer]

Background

• In the current version, the code is written in Javascript. Our other actions are written in Python.
• Action is not optimized to keep the lowest possible API requests.

Feature

• Migrate action from node.js to composite type.
• Introducing PyGithub lib to replace the request base solution used in another GH Action PoC.
• Refactor code to reach the lowest possible count of API calls.

[github-actions]

Release notes:

• Fully refactored action from node.js to composite.
• Used python.
• Reached almost the same functionality with reduced API call requirements.
• Implemented full unit test coverage.
• Add CI unit test support.
• Add initial version of CI code coverage measurement and possible failure when limits are not reached.