Figure out how to get search functionality for docs

[mdedetrich]

What is currently missing?

There isn't a way to search through documentation

How could this be improved?

Similar to akka and alpakka which have search functionality Guardian docs should have the same. From looking at the source code in the akka paradox theme project it appears they are using algolia docsearch.

Need to investigate whether we want to use algolia-docsearch or some better alternative and also implement it.

Is this a feature you would work on yourself?

• I plan to open a pull request for this feature