Search on the docs of each charm on charmhub

On charmhub.io users are expected to find the docs of each charm. This is great as it results in a good user experience however currently we are missing a way to search over the docs.

Let’s say I want to learn more on topic X of charm Y. Right now I need to go through the titles of all pages of the charm Y docs one by one to spot one that may be related to X. The search feature is a requirement for the diataxis framework because the navigation menu is not structured based on the discussed topics but on the type of the pages.