split permissions server and ui code

[nichtsam]

solves #609

Test Plan

Checklist

• Tests updated
• Docs updated

Screenshots

[kentcdodds]

Thank you!

I like the suggestion @gregleeper made. Do you think you could move the permissions.ts contents to user.ts? I think that would make this even better.

[nichtsam]

Definitely! I amended the commit to reflect the suggestion.

However I left PermissionString and parsePermissionString in permissions.ts.
I find this easier to reason about, otherwise it'd be permissions.server.ts importing these thing from user.tsx, and it somehow feels weird to me. Nevertheless, let me know if you would rather have it all moved into user.tsx and I would update again!

[kentcdodds]

I think I'm ok moving the parsing utility to user.ts along with the other permission stuff. I don't mind having the permissions.server.ts importing stuff from user.ts :)

Thanks!

[kentcdodds]

Lovely. Thank you!