Run automatically generated room codes against profanity filter

[netthier]

Checklist

• [X] I've checked both open and recently closed issues to ensure this feature is not already requested.
• [X] I am using the newest version of TETR.IO.
• [X] I am certain this is a feature request, not a bug.
• [X] I've thought this feature through properly.

Is your feature request related to a problem? Please describe.

When creating new private or public rooms, TETR.IO randomly generates a four letter room code. This code is not run against any profanity filters, resulting in room codes possibly containing profanity or slurs.

Describe the solution you'd like

Randomly generated room codes should be run against a filter and regenerated if necessary.

Describe alternatives you've considered

I haven't considered any alternative solutions.

Additional context

[orangetriangle]

This oversight might also occur with custom room IDs, available with Supporter. Would test in a private room, but I'm not a supporter myself :p

[ZaptorZap]

Ironically, I can't show you myself, since I'm apart of staff and my room code setting will be forced, but don't worry, those are protected against.

[KonSola5]

It seems that the room codes aren't protected against profanity.

[ZaptorZap]

Indeed, that's the entire purpose of this issue report.