Add Search Functionality to Docs

Looks like with a bit of hacking you can implement Algolia Search:

[Blog about Algolia in eleventy](https://www.raymondcamden.com/2020/06/24/adding-algolia-search-to-eleventy-and-netlify)

I've been using the docs site a lot, and it's frustrating to not be able to search for specific content.

Example use case, I want to look up the terms Bytes and Links which are unique data kinds (also the word data kind instead of type is something I need to know) and to know that, I have to reason about where you may have put that in the doc tree (navigation at the left). Is it in Data Model? Nodes and Kinds? Still actually can't find it, hrm.