feat: Add bot to post test coverage on PRs

[tejaskh3]

Description

• Implement a bot that automatically posts test coverage reports on pull requests. This will help track coverage changes and ensure quality standards are met.
• This feature is needed because @iamitprakash asked about test coverage on a PR that included test cases but did not have coverage data attached.

Current Behavior

• We do not have any CLI-based code coverage package in our database.
• As a result, we cannot track test coverage on PRs that include test cases.

Expected Behavior

• A bot should automatically comment on PRs with the test coverage details.