Support the new Windows Projected FileSystem

[Jezza]

With a recent release of Windows 10, a feature moved from Beta meaning we can start taking a look at this properly from within Rust. (And properly introducing it to the ecosystem)

https://docs.microsoft.com/en-us/windows/desktop/projfs/projected-file-system
https://docs.microsoft.com/en-us/windows/desktop/api/_projfs/

[Jezza]

I'm going to try implementing it myself, but don't get your hopes up.
I haven't touched windows APIs in a long time...

[steffengy]

@Jezza cool, I'll might be interested in that feature aswell - have to evaluate if this works for playing around with "mounting" SFTP.
EDIT: got a very minimal "hello world" set with a single file working already, so if anyone else is interested let me know.

[clouds56]

@steffengy it would be great if released as a crate!

[clouds56]

I write a minimal crate that supports ProjFS: https://github.com/clouds56/projfs-rs
Note it's in early development and the API MUST be changed frequently, suggestions welcome.