I cannot initialize my WebAssembly built from Rust. It told me failed to fetch when I call init()

Hi, I am trying to add the WebAssembly I built from Rust by [this](https://developer.mozilla.org/en-US/docs/WebAssembly/Rust_to_Wasm) guide into my Snap. I added the pkg folder into /packages/snap

In my index.tsx, I added `import init, { greet, get_hello_world_string } from '../pkg/hello_wasm.js';`.

Then I was trying to add `await init('../pkg/hello_wasm_bg.wasm');` into `onRpcRequest`. I did not work and I was given error "failed to fetch" when I click send message in the webpage of localhost:8000.

I also tried `await fetch('./hello_wasm_bg.wasm');` and `await fetch('../pkg/hello_wasm_bg.wasm');` They were all giving the same error failed to fetch.

I already added` "endowment:network-access": {}, "endowment:webassembly": {}` into my snap.manifest.json

Can any tell me how can I add my WebAssembly correctly into my Snap?

Start by reproducing the failure from index.tsx, focusing on the await init call inside onRpcRequest and the referenced pkg/hello_wasm.js and hello_wasm_bg.wasm paths. Check snap.manifest.json alongside the Rust-to-Wasm setup guide; done means the WebAssembly module initializes successfully when the localhost:8000 request is sent.

Written by the indexing model from the issue text.