Enhancement/5732 rest controller

[asvinb]

Summary

Addresses issue:

• #5732

Relevant technical choices

PR Author Checklist

• [x] My code is tested and passes existing unit tests.
• [x] My code has an appropriate set of unit tests which all pass.
• [ ] My code is backward-compatible with WordPress 4.7 and PHP 5.6.
• [x] My code follows the WordPress coding standards.
• [ ] My code has proper inline documentation.
• [x] I have added a QA Brief on the issue linked above.
• [x] I have signed the Contributor License Agreement (see https://cla.developers.google.com/).

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Code Reviewer Checklist

• [x] Run the code.
• [x] Ensure the acceptance criteria are satisfied.
• [x] Reassess the implementation with the IB.
• [x] Ensure no unrelated changes are included.
• [x] Ensure CI checks pass.
• [ ] Check Storybook where applicable.
• [x] Ensure there is a QA Brief.

Merge Reviewer Checklist

• [ ] Ensure the PR has the correct target branch.
• [ ] Double-check that the PR is okay to be merged.
• [ ] Ensure the corresponding issue has a ZenHub release assigned.
• [ ] Add a changelog message to the issue.