feat: support WIT source inputs in component bindgen macro

[andreiltd]

Add explicit wit, wasm, and inline input forms for component bindgen macros. It is backward compatilbe. New macro arguments allow things like:

// wit file
hyperlight_component_macro::host_bindgen!(wit: "wit/world.wit");
// wit package
hyperlight_component_macro::host_bindgen!(wit: "wit");

// wasm encoded component type
hyperlight_component_macro::host_bindgen!(wasm: "wit/world.wasm");

// Inline wit
hyperlight_component_macro::host_bindgen!({
    inline: r#"
        package test:inline;

        world test {
            export run: func();
        }
    "#,
    world: "test",
});

// Select a world from a multi-world wit package
hyperlight_component_macro::host_bindgen!({
    wit: "wit",
    world: "my-world",
});

// Legacy wasm-compatible forms still work
hyperlight_component_macro::host_bindgen!("wit/world.wasm");
hyperlight_component_macro::host_bindgen!({
    path: "wit/world.wasm",
    world_name: "my-world",
});

[Copilot]

Pull request overview

This PR extends Hyperlight’s component bindgen proc-macros to accept WIT sources directly (WIT files, WIT package directories, and inline WIT), in addition to the legacy “wasm-encoded WIT” inputs, and updates tests/CI scripts to rely on WIT sources rather than pre-generated .wasm artifacts.

Changes:

• Add a WitSource input abstraction in hyperlight_component_util and route bindgen through it (WIT file/dir, wasm, inline).
• Extend host_bindgen! / guest_bindgen! parsing to accept wit:, wasm:, and inline: forms (plus world selection).
• Update test fixtures, integration tests, and CI/Just recipes to use WIT inputs directly and drop the artifact upload/download flow for generated .wasm WIT containers.

Reviewed changes

Copilot reviewed 9 out of 11 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/tests/rust_guests/witguest/src/bindings.rs	Switch guest bindgen invocation from wasm container to wit: input.
src/tests/rust_guests/Cargo.lock	Lockfile updates for rust guest workspace deps.
src/hyperlight_host/tests/wit_test.rs	Update host-side bindgen tests to use wit: and add inline-WIT bindgen coverage.
src/hyperlight_component_util/tests/wasmtime_guest_codegen.rs	Expand component-util tests to cover WIT/wasm/inline input handling.
src/hyperlight_component_util/src/util.rs	Introduce WitSource and unify WIT type reading across input forms.
src/hyperlight_component_util/Cargo.toml	Add wit-component / wit-parser dependencies to support WIT parsing/encoding.
src/hyperlight_component_macro/src/lib.rs	Extend macro docs + parsing to accept explicit wit:/wasm:/inline: inputs and world selection.
Justfile	Remove WIT-to-wasm generation steps; adjust clean/test/clippy targets accordingly.
Cargo.lock	Workspace lockfile updates for new WIT-related dependencies.
.github/workflows/dep_build_test.yml	Remove download steps for pre-generated WIT .wasm artifacts.
.github/workflows/dep_build_guests.yml	Remove upload steps for pre-generated WIT .wasm artifacts.

[danbugs]

Mostly LGTM, just two minor comments.

[danbugs]

If this fails, we'd just get a generic unwrap panic, might want to improve the error msg

[danbugs]

I don't think we reach this if the assert fails?