Replace search for generators with the new search used on the website

[Haroenv]

Type of issue

feature request

Why?

once https://github.com/yeoman/yeoman.github.io/pull/763 is merged and we're all happy with it, we can replace the search to be consistent with what's on the site

Relevant code

The code to change will be around this:

https://github.com/yeoman/yo/blob/479250a28220a6dcb75130f687f2e097498d4cfc/lib/routes/install.js#L44-L102

There algoliasearch could be used with the same searchParameters as in https://github.com/yeoman/yeoman.github.io/pull/763#discussion_r182426599

cc @mischah, @SBoudrias, @pixelastic