Add a task for auto assigning performers

[iwiwdt]

It would be very useful if it were possible to scan the files and if there is a performer full name in the file path, like in the file name or some directory further up, then the performer is very likely in the file.

[StashAppDev]

I actually had something like this in the old version which I never did commit. Mine was a bit different though in that it would iterate through each performer and look for the performer name or aliases in the details, title, or path. If it found a match then it would prompt the user if they'd like to attach that performer to that scene.

I do think this is a good idea, I just need to think through the implementation details.

[WithoutPants]

@Leopere can this be closed?

[Leopere]

Looks like it can be.