[Feature] Allow multiple url's for a performer

[Tweeticoats]

**Is your feature request related to a problem?
The performers has a single url field as well as a twitter and instagram profile.
This should be replaced with a list allowing an unlimited amount of url's to be added.
Url's are a useful way of adding identifiers for sites so you can submit the profile url on each site for example.

Describe the solution you'd like
Create a new table to store url's and update the user interface to allow you to enter more information.
When the user adds a url the user interface should create a blank url field encouraging the user to enter more url's

Describe alternatives you've considered

Additional context
Having more url's allows you to use these as identifiers in other databases.
If we can have the profile url on each adult website it can help with disambiguation of performers with similar or the same name.
When scraping a site you can look for url's that match the profile url attached to the performer.

[IAmKontrast]

Feature handled in this PR #1959