wit: name collision + noff_var_id

[jsturtevant]

What happened?

When a WIT component imports multiple interfaces that share the same final name from different packages (e.g. wasi:filesystem/types and wasi:http/types), the host_bindgen! macro generates duplicate trait members in the RootImports trait:

// Both wasi:filesystem/types and wasi:http/types produce:
type Types = ...;
fn types(&mut self) -> ...;

This causes: error[E0428]: the name 'Types' is defined multiple times

Additionally, once colliding names are disambiguated (e.g. FilesystemTypes), noff_var_id and emit_resource_ref still generate the old un-disambiguated name (I::Types) for type variable references and resource table entries, causing error[E0220]: associated type 'Types' not found for 'I'.

Steps to Reproduce

Use a WIT world that imports both wasi:filesystem/types and wasi:http/types:

world root {
  import wasi:filesystem/types@0.2.0;
  import wasi:http/types@0.2.0;
  export my:app/executor;
}

WIT_WORLD=world.wasm cargo build

Expected Results

Each interface gets a unique trait member name, e.g.:

• wasi:filesystem/types → FilesystemTypes / filesystem_types()
• wasi:http/types → HttpTypes / http_types()

Actual Results

TODO: What actually happened?

Versions and Environment

Hyperlight version or commit: TODO

OS Version

Run the following to find your OS version:

Linux:

cat /etc/os-release && uname -a

Windows (PowerShell):

cmd /c ver

Hypervisor

Run the following to check hypervisor access:

Linux:

ls -la /dev/kvm /dev/mshv 2>&1; getfacl /dev/kvm /dev/mshv 2>&1; id
[ -r /dev/kvm ] && [ -w /dev/kvm ] && echo "KVM: OK" || echo "KVM: FAIL"
[ -r /dev/mshv ] && [ -w /dev/mshv ] && echo "MSHV: OK" || echo "MSHV: FAIL"

Windows (Admin PowerShell):

Get-WindowsOptionalFeature -Online | Where-Object {$_.FeatureName -match 'Hyper-V|HypervisorPlatform|VirtualMachinePlatform'} | Format-Table

Extra Info

Anything else you'd like to add?