Feature: Submission/Comment Word Filter

[nautbot]

We knew it would come to this...

Implement word filter for post titles and body text, as well as comment body text. Nothing crazy, mainly removal of racial slurs and what not.

A couple of external libraries to look at:

https://github.com/developerdino/ProfanityFilter

https://github.com/jcrowe206/BadWordFilter

@DEVxALMIGHTY Raised the concern of performance and user experience impact.

As far as user experience, perhaps flagging by a word filter can lower the removal threshold for the proposed auto-moderation functionality - e.g. post/comment is flagged by library, requiring only one or two user reports to trigger removal instead of standard limit.

No clue what damage this would do on performance. Totally open to suggestions.

See also issues #86 & #160.