Add color picker widget

[ellieeet123]

Adds a color picker widget above search results when the keyword "color" or "colour" is in the query. Also slightly refactors the widget inserting code in the backend.

Note - During the writing of this I was interrupted by some real-life drama and had to step away from it for a few months and kind of forgot what I was doing here, so the code's quality isn't amazing. If you want to (or want me to) feel free to improve it or ask me to. But as far as I know it works for now.

[benbusby]

I'm a bit on the fence about this. I do like the idea of having a color picker embedded in Whoogle, but this seems like a fair amount of additional code that I'd need to maintain moving forward, and I'm trying to keep Whoogle as minimal as possible. Plus I think a lot of people who use color pickers (myself included) are fine with either using a browser extension or something like Firefox's built in eyedropper. It'd be nice if there was a way to load extensions from someone else's repo so that it could stay separate from Whoogle, but idk how well/if that would work.

[ellieeet123]

That's definitely fair. If you like the idea, we could theoretically have just an embed tag inserted into google that then links to a GitHub pages site hosting all the static widget files on a different repo (I'd be happy to maintain that unless somebody else wants to) so that way it would be a separate project and could be removed easily if necessary. Let me know what you think.