Rebuild permissions system.

[insertish]

For #6 and #4.

Current hierarchy:

[insertish]

Ideally, we could build it similar to how Discord inherits permissions so that there's not much of a learning curve.

https://support.discord.com/hc/en-us/articles/206141927-How-is-the-permission-hierarchy-structured-

Although, it would be worth adding role permission deny.

[sairam4123]

Please do make sure that roles follow Hierarchy and override lower roles.

[erkinalp]

Ideally, we could build it similar to how Discord inherits permissions so that there's not much of a learning curve.

Discord does not inherit permissions from the parent category. Revolt could depart from that and actually inherit from the parent category. Also to mention, it uses an "explicit allow wins" system which is inconvenient in a lot of respects. "Explicit deny wins" is better suited to express permissions for any serious use.

[insertish]

Now closes #4 as of revoltchat/quark@d2e49a6. (This repo will be public once license is added.)

[insertish]

The following does not account for categories yet, still sorting out the data model.
Current permission hierarchy looks like this:

I am currently working to implement this.

[erkinalp]

Allows then denies, so explicit deny wins. This seems sane to me. After all, lockout is better than power out of control.

[insertish]

Fix relevant issue revoltchat/revite#84 while we're at it.