Add maintainers and codeowner files to each repository

[alexlovelltroy]

Add example maintainers.md and codeowners.md file to the community repo and add subtasks to implement them across OpenCHAMI software repositories as well.

[yogi4]

Should these templates be part of .github repo instead?

[github-actions]

This issue has been automatically marked as stale due to inactivity. Please add a comment or label to keep it open; otherwise it will close in 7 days.

[github-actions]

Closing due to inactivity. Feel free to reopen with new information.

[github-actions]

This issue has been automatically marked as stale due to inactivity. Please add a comment or label to keep it open; otherwise it will close in 7 days.

[github-actions]

Closing due to inactivity. Feel free to reopen with new information.

[synackd]

This was reopened before, so I presume this is still planned.