Add `CODEOWNERS` file to automatically request reviews and speed up PR review time

[jbampton]

The required feature described as a wish

Code owners are automatically requested for review when someone opens a pull request that modifies code that they own. Code owners are not automatically requested to review draft pull requests.

The people you choose as code owners must have write permissions for the repository. When the code owner is a team, that team must be visible and it must have write permissions, even if all the individual members of the team already have write permissions directly, through organization membership, or through another team membership.

So some of the other ASF project are using CODEOWNERS like Apache Airflow and it works really well as it auto requests the people you need to review specific code / files / directories.

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

https://github.com/apache/airflow/blob/main/.github/CODEOWNERS

So a great example of this CODEOWNERS file in action is at this next link:

apache/airflow#55688

And shown here in the attached images we have the CODEOWNERS with the "shields" being auto requested to provide a review.

[weizhouapache]

nice, great idea!

cc @DaanHoogland @rohityadavcloud

[DaanHoogland]

yes, would be great.