Create a CODEOWNERS file to auto assign reviewers

[DhruvaG2000]

We need to add a CODEOWNERS file [1] to this repo so that we can auto assign reviewers.

[1] https://docs.github.com/en/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners

[DhruvaG2000]

We should take inspiration from how it's being done in Zephyr: https://github.com/zephyrproject-rtos/zephyr/blob/main/CODEOWNERS

If you see their file too has "Errors" according to github, but they don't use the "Github" way of assiging reviewers it seems like they do some amount of scripting here: https://github.com/zephyrproject-rtos/zephyr/blob/main/.github/workflows/assigner.yml which ultimately runs a python script:
https://github.com/zephyrproject-rtos/zephyr/blob/main/scripts/set_assignees.py

This script then parses https://github.com/zephyrproject-rtos/zephyr/blob/main/MAINTAINERS.yml and then auto assigns reviewers.

[StaticRocket]

Found a workflow that does the same thing the zephyr project tool was doing, but without reusing the CODEOWNERS format, so it doesn't actually conflict with GitHub right now.

We should be able to run with this until https://github.com/orgs/community/discussions/23042 is resolved.

[DhruvaG2000]

@StaticRocket no no.. We don't even really need to use CODEOWNERS if you see zephyr python script, it parses the maintainers file. So there's no conflict.

[cshilwant]

until https://github.com/orgs/community/discussions/23042 is resolved.

@StaticRocket I don't think they are thinking to resolve it.
I mean the thread was last responded by a GitHub team in 2019 🙂

[StaticRocket]

I have faith. We've had bugs open for longer durations. :)

[cshilwant]

Re-opening this issue (which got auto closed) since the plan is to use #32 as well to assign pull requests to default reviewers based on sections.