[Feature Request] Add "grep - extract" column

[MaCrek22]

It would be great if would be possible to add column in "logs" tab, regards "grep - extract" configuration.
Same feature has Intruder module.

[CoreyD97]

This is very much a WIP implementation, and doesn't persist across restarts yet. Ideally I'd like to carry out more testing on this since the regex is being matched dynamically by the table.

As such, I'm not sure if this is called once per entry or if it is called any time the table is scrolled etc, and so could have major performance problems. If so, I'll need to look into an alternate implementation but that could require a significant change to how the functionality works.