Enable a search engine

[alainm23]

Before thank you for developing this incredible application.
In ValaDoc the list of documentation is very long, a search engine would make the search easier

[mdh34]

are you referring to the list of offline packages? If so this was added in 6122daf and should be present in the 2.1.1 release

[alainm23]

Thank you very much, I did not realize 💯