Add Repo Automator GH Action

[iamdharmesh]

Description of the Change

PR adds Repo Automator GH Action to help automate common repo operations listed here

How to test the Change

1. Validate "Repo Automator" check is pass if the PR description is valid
2. Ensure PR gets auto-assigned to PR author, milestone auto-added and code- review label gets auto-added.

Changelog Entry

Added - Repo Automator GH Action to automate repo operations.

Credits

Props @iamdharmesh

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added tests to cover my change.
• All new and existing tests pass.

[dkotter]

Curious if there's any benefit to running this when changes are merged into develop? Seems like this action is for Issues and PRs so doesn't seem like this would be needed.

[iamdharmesh]

@dkotter Yes, Action is for handling issues and PRs, but it also identifies potential merge conflicts with PR branches. So, essentially, it is related to PRs, but we need to trigger this on the push to the develop branch to check potential merge conflicts and auto-label/auto-comment PRs with merge conflicts.

Action internally handle operations based on the trigger. So, it will only run the merge conflicts check when trigger is push to develop and PR/Issue related check will be skipped.

Please let me know if you need any further information on this.