feat: Add support for MergeToCell API

ron-gal commented 4 months ago

Thank you for opening a Pull Request! Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

[x] Make sure to open an issue as a bug/issue before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
[x] Ensure the tests and linter pass
[x] Code coverage does not decrease (if any source code was changed)
[x] Appropriate docs were updated (if necessary)
[x] Rollback plan is reviewed and LGTMed
[x] All new data plane features have a completed end to end testing plan

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