[feat] Role Preserve: Ignored/Blacklisted Roles

[ktwrd]

New feature for Role Preservation to ignore/blacklist roles from being given to users when they re-join. Useful if you have a server that required users to raise a ticket to be let in, and have a manual approval process.

DB Layer and Application Commands are complete. Just finishing up the UI for the settings (which is currently being rewritten)

I've also added an auditing feature to Role Preservation, so it's audited if anything went wrong with granting a users roles back, and what roles were granted back. This auditing also includes when a staff/mod updates the Role Preservation configuration.

Tasks:

• Add database models
• Add GuildRoleCache to database (just points to latest snapshot w/ basic info like name)
• Add logic removing blacklisted roles in the db when the role is deleted
• Add slash commands for viewing configuration
• Add slash commands for add/remove roles from blacklist
• Add web panel UI for viewing blacklisted roles (incl partial refactor of web ui for moderation)
• Add web panel UI for adding blacklisted roles (will be done in a later release maybe)
• Add logging feature for role preserve (todo in future release)
  • Partially done. Need to implement "success" log notifications (only for ServerLogEvent.RolePreserve)

[ktwrd]

properly finished logging for failure notifications. going to add success/skip notifications later.

also added url in dashboard to link to the server logging page for a server. will also need to be updated in the dashboard refactor since the UI is a bit hard to navigate right now

[ktwrd]

"success" log events should now be sent whenever there is never failures (and will only be sent to the configured RolePreserve channel or fallback channel)

i haven't tested the feature yet, but it should work

it would be nice to implement a feature to explicitly block server log events from being sent in the fallback channel, but that might overcomplicate things for the average user (and stuff only sends to the fallback channel when no channel is configured for an event, or it didn't get sent successfully)

[ktwrd]

fixed more bugs & minor nitpicks w/ server logging & role preserve logging. the role preserve guide page has also been updated on the staging website, and that'll be deployed to the prod website once this is live in prod.