LSP: Cannot resolve local dependencies outside of the main file

[phated]

Aim

The LSP should work with local dependencies in files other than the main.nr file.

Expected Behavior

When I create a file, such as foo.nr with this content:

use crate::bar::bar;

fn foo(x : Field, y : Field) {
    bar(x, y);
}

The dependency should not be a compile error.

Bug

This bug stems from the fact that we compile the saved file (foo.nr in the example above) as the root of the project. Since the root file is expected to contain the mod definitions, but those are all specified in main.nr, the LSP compilation reports an error because there was no mod bar.

Side note: adding mod bar makes the file compile with no warnings via the LSP but nargo compile would fail because it is not actually the root.

To Reproduce

1. Create a multi-file noir project
2. Use a crate:: dependency in a file that is not main.nr
3. Save the file with the LSP running
4. Notice the diagnostic warning on the dependency

Installation Method

None

Nargo Version

No response

Additional Context

No response

Would you like to submit a PR for this Issue?

No

Support Needs

No response