Feature request: Replace use with qualified path

In some instances, an assist that does the opposite of "Replace qualified path with use" would be nice. For instance, I prefer using anyhow::Result as a qualified path instead of importing it, but occassionally come across use of it in codebases I maintain.

I think it would be useful to offer this assist both on a symbol in a use statement, as well as on uses of that symbol, although I'm not sure what semantics would be best for the latter – qualify just that one use or qualify all uses and remove the import.

Start by locating the existing assist named "Replace qualified path with use" and its related tests or entry points. Define the inverse behavior for a symbol in a use statement and for uses of that symbol, including whether one or all uses are qualified and whether the import is removed. Done means the chosen semantics are implemented with coverage for both invocation contexts.