Change the search engine

[AdvancedUA]

I use/pay for Kagi, I De-Googled and would love an option to change the default option from Google to Kagi (Or the search engine of a user's choice, in general)

Unless you have it and I missed it, I couldn't find it in the manual :)

[Klocman]

You can quite easily add a new search engine to the source and compile it. PRs are welcome.