[DOCS] ability to filter content with a search bar

[gioboa]

How can the documentation be improved? having the ability to filter content with a search bar is definitely a cool improvement Here an example

[manucorporat]

yes! so we already have a Open source account approved by Argolia, we are waiting to update qwikcity docs to the latest qwikcity before making changes to it.

Definively, planning to add search!

[felixsanz]

@manucorporat @adamdbradley this can be closed already!