chore(config): create codeowners file

[HasithDeAlwis]

What is the problem at hand?

As our project gets larger and larger our internal team can't be expected to keep track of all incoming pull requests. Additionally, we want to ensure that the code that enters our codebase is of high quality and isn't reviewed by someone who doesn't understand the codebase.

What is the solution

Create a codeowners file. This will allow us to automatically set required reviewers for an issue.
Example
Let's say I was an expert on the docs. With codeowners any issue that touches the /docs directory will automatically have me as a reviewers, AND branch protection rules will be setup so that a codeowners must review the PR.