@ts-self-types in generated .js

[pcarrier]

💡 Feature description

When generating Deno bindings (maybe all bindings?), it would be great if the generated JS file included a @ts-self-types comment. This would let Deno tooling access type definitions automatically.

💻 Basic example

Instead of myproject.js starting with:

function addToExternrefTable0(obj) {
    const idx = wasm.__externref_table_alloc();
    wasm.__wbindgen_export_2.set(idx, obj);
    return idx;
}

It would start with:

// @ts-self-types="./myproject.d.ts"

function addToExternrefTable0(obj) {
    const idx = wasm.__externref_table_alloc();
    wasm.__wbindgen_export_2.set(idx, obj);
    return idx;
}