[FR] Add aisearch function

[svilupp]

It would be great to provide a direct interface for Tavily search API for Julia specific searches.

On google, one encounters a lot of noise because Julia is not as common programming language. With a dedicated function, we could automatically outline some domains to include/exclude to automatically improve on the answer quality.

As an additional benefit, it would prevent us from having to break our flow and go to a browser.

Suggested interface: aisearch("some question about julia")
Tavily can automatically provide an answer as well, so we can skip the LLM call. But we could also add an LLM call that will know it's Julia specific. We'd need to measure which works better.