Missing auto-import for subpath imports of other local packages

@andrewbranch ci sta già lavorando.

Dal 2/4/2026.

### Extension Version

0.20260303.1

### VS Code Version

1.108

### Operating system Version

Ubuntu 24

### Steps to reproduce

1. Clone example repo https://github.com/psznm/subpath-ts.git
2. npm install
3. try auto-import in main2.ts

### Issue

When using npm workspace local workpaces are linked to node_modules. Subpath imports can then point to that package.
In example repository [package.json](https://github.com/psznm/subpath-ts/blob/master/pkg1/package.json) of pkg1 has various imports specified. #pkg1 and #pkg2 are problematic subpaths specified to their respective packages. #pkg3 and #pkg4 are relative subpaths.

But in [main2.ts](https://github.com/psznm/subpath-ts/blob/master/pkg1/src/nested/nested2/main2.ts) only two autoimports are offered as can be seen in image below. Neither relative, nor package subpath for pkg2 works.

Probably all other subpaths should be offered for auto-import. Or at least one from the other package to cover all unique paths.

Also note that this did not work with strada either. Created this here only [due to this](https://github.com/microsoft/TypeScript/issues/62827)