[js/web] allow import .mjs/.wasm file (#23487)
### Description
Allow importing the `.mjs` and `.wasm` files.
when using Vite, this enables web app to consume ORT-web for simplify
the setup:
```js
import * as ort from 'onnxruntime-web';
import wasmFileUrl from 'onnxruntime-web/.wasm?url';
ort.env.wasm.wasmPaths = { wasm: wasmFileUrl };
