Create CODEOWNERS

[snappy316]

The selected code owners in this PR are either because of their team or individual contributions to the codebase, a recent PR, or because more specific code owners were not identified.

Here are some possible paths forward.

• approve the PR :)
• accept that this is a "first effort", approve the PR, and we can iterate as pain is felt and more specific code owners are identified.
• archive (or delete) the repo.

Any major concerns can be discussed in #codeowner-questions-comments-concerns-upheavals

We would prefer any dicussion to happen in the slack channel rather than here, because the opener of this PR is not necessarily the one who made the selection.

[snappy316]

Affected Product
Which product does this bug affect?

GitHub

Describe the bug

This repo does not have a CODEOWNERS file.

To Reproduce

1. Go to https://github.com/planningcenter/developers/tree/main/.github/CODEOWNERS
2. Observe the 404 page

Expected behavior

Go to https://github.com/planningcenter/developers/tree/main/.github/CODEOWNERS and see

* @planningcenter/engineering-leads

Screenshots

Additional Context:

• Endpoint: [e.g. API endpoint I'm using] https://github.com/planningcenter/developers/tree/main/.github/CODEOWNERS
• Language: [e.g. Programming language I'm using] HTML
• Authentication: [e.g. OAuth 2, Personal Access Token, Browser Session (Cookie)] GitHub

Additional context

I have..

• Reviewed the documentation found at https://developer.planning.center/docs
• Searched for previous issues reporting this bug
• Removed all private information from this issue (credentials, tokens, emails, phone numbers, etc.)
• Reviewed my issue for completeness