Set up code owners

[swissspidy]

Adds certain people as code owners for certain areas.

See https://help.github.com/en/github/creating-cloning-and-archiving-repositories/about-code-owners for documentation.

See #319.

[github-actions]

Size Change: +11 kB (4%)

Total Size: 245 kB

Filename	Size	Change
assets/css/edit-story.css	189 B	+11 B (5%)	🔍
assets/js/edit-story.js	244 kB	+11 kB (4%)

_{compressed-size-action}

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
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[swissspidy]

^ @barklund

[barklund]

@googlebot I fixed it.

[swissspidy]

OK well apparently it didn't get it 🙄 Will add it manually at the end.

[swissspidy]

@dvoytenko @barklund @spacedmonkey @miina WDYT about the proposed code owners config? Potentially noisy or OK?

[miina]

Looks OK to me.

[barklund]

I'm fine with this. Let's try it out, and if it becomes too noisy, we can always change it.

I really like the "default reviewer" thing - especially for a growing team.

[googlebot]

A Googler has manually verified that the CLAs look good.

(Googler, please make sure the reason for overriding the CLA status is clearly documented in these comments.)

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[dvoytenko]

LGTM from me, but I believe you should make @pbakaus a global owner as well given the time difference. I'm sure he won't abuse it. Plus, two global owners is definitely better than one.

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and then comment @googlebot I fixed it.. If the bot doesn't comment, it means it doesn't think anything has changed.

ℹ️ Googlers: Go here for more info.

[googlebot]

A Googler has manually verified that the CLAs look good.

(Googler, please make sure the reason for overriding the CLA status is clearly documented in these comments.)

ℹ️ Googlers: Go here for more info.