Add the ability to exclude artists in a search

Is your feature request related to a problem? Please describe. (required)

There are many times when there may be a dominant artist in a specific tag that a user may not be looking for (for example, Kikuo in the "insane fantasy" tag), or for when a user is attempting to search for works using one vocal synth but not another (for example, someone trying to search up Rin songs that don't use Len). However, with the current search system, there is no way to exclude a certain artist from a search in the same way that tags can be excluded.

Describe the solution you'd like. (required)

Users should have the ability to exclude a certain artist in the search field, just like how tags can currently be excluded from a search. On the box where you type an artist's name in, the "include" and "exclude" options currently present in the tag field would be added, allowing users to add another layer of specificity to their searches.

How should the UI look like? (illustrate it) (optional)

It would look exactly like the current ability to exclude a certain tag, just extended to the artist section.

Checklist (required)

Fill out the checklist.

[x] Searched VocaDB/vocadb for duplicate issues.

VocaDB / vocadb