[Feature Request]: Persistent caches

[montekki]

One of the latest posts states:

One of the current peculiarities of rust-analyzer is that it doesn’t persist caches to disk. Opening project in rust-analyzer means waiting a dozen seconds while we process standard library and dependencies.

And while that may be true when working with IDEs like VScode that are launched once and used for a long period of time, other workflows that involve editors like vim and closing/opening lots of windows that don't share rust-analyzers state between each other is actually quite painful. Each time a new window is opened one has to sit and wait and for large repos that is quite a long period.

P.S. Sorry if it's a duplicate