ci: add code coverage checking script

[ashutosh-ukey]

Summary

Add code coverage checking script.

Detail

Add a script that checks that the coverage of each files matches our minimum defined threshold. Currently, the script doesn't fail. Once you files meet our defined threshold, we can uncomment the line tht will make the script start failing.

Checklist

• Did you add new tests and confirm all tests pass? (yarn test)
• [] Did you update relevant docs? (docs are found in the docs folder)
• Do your commits follow the Conventional Commits standard?
• Does your PR title also follow the Conventional Commits standard?
• If you have a breaking change, is it correctly reflected in your commit message? (e.g. feat!: breaking change)
• Did you run lint (yarn lint) and fix any issues?
• [] Did you run formatter (yarn format:check) and fix any issues (yarn format:write)?

Testing

See Coverage -> run_coverage (pull_request) -> Run Test Coverage job logs in latest PR build.