feature request: Promote / Downgrade module

[longfangsong]

IntelliJ's Rust plugin supports:

• Promote Module to directory, which means make a .rs file module into a directory style module with the same name.
• Downgrade Module to file, which means make a directory style module with only a mod.rs inside into a file module.

I use these feature a lot, but when migrating to vscode and rust-analyzer, I found there're no such things.

So is it possible for rust-analyzer to support these?

(I'd love to have a try to implment this feature if you think this is a good idea.)

[lnicola]

There's a "Move inline module to file" assist that might work as a starting point.