Implement a GNOME Shell Search Provider
Idea provided by @msandova in the Fractal room:
From the GNOME Developer Documentation::
A search provider is a mechanism by which an application can expose its search capabilities to GNOME Shell.
A crate is available for that: https://gitlab.gnome.org/World/Rust/search-provider.
The initial idea is to provide at least the rooms the user is in. We have to investigate if it makes sense to also include search results from the "Explore" screen or from contacts in the rooms.