Add the "Collection Search" widget to the content view search screen

Well. All is in the title, isn't it?

We have the ability to search on collection(s) in the default searches: Default faceted search and default DAM search.

It would be great to have this widget available by drag-drop in Studio, just like we have "Tags" for example.

As of today, we have to add a schema to the registry and setup some properties in a multipleSuggestionWidgets (see here)