[Feature] Merge Performer Aliases on Scrape

[C-BoT-AU]

Is your feature request related to a problem? Please describe.
When scraping a performer, especially from different Stash Boxes (to update information and/or assign additional Stash IDs for those instances), the Performer Aliases are presented as a choice between the existing and scraped.

Describe the solution you'd like
The ability to set a default to merge the scraped aliases into a single list - Much like how performer URLs are handled and scraped URLs are added to the list.

Describe alternatives you've considered
Currently the only option is to manually copy and paste into the "scraped" results box, and then manually dedupe. For some performers, this isn't too hard but many Eastern European performers with dozens of names and spellings is painful and requires then removing by error.