Support WebGPU

[DanielHauschildt]

Added support for

• WebGPU
• Patched ISNET for WebGPU execution
• Onnx runtime with WebGPU support
• Smaller ModNet Model

Added "device" parameter with options "cpu | gpu". For now "cpu" is default.

[mirko314]

Works great and super quick in Chrome!!
However, I could not get the example to work in Safari and Firefox. I'd expect a gracefull fallback to lower-performance runtimes until one is found that works in the browser

[mirko314]

I find this code path seems a bit hard to scan, I'd personally like to simplify this logic

[DanielHauschildt]

Feeded your comment to CoPilot and my sidekick wants to change it to this:

const wasmPaths = {
'ort-wasm-simd-threaded.wasm': useThreads && useSimd,
'ort-wasm-simd.wasm': !useThreads && useSimd,
'ort-wasm-threaded.wasm': !useWebGPU && useThreads && !useSimd,
'ort-wasm.wasm': !useWebGPU && !useThreads && !useSimd
};

for (const [key, value] of Object.entries(wasmPaths)) {
if (value) {
const wasmPath = useWebGPU && key.includes('simd') ? /onnxruntime-web/${key.replace('.wasm', '.jsep.wasm')} : /onnxruntime-web/${key};
ort.env.wasm.wasmPaths[key] = await loadAsUrl(wasmPath, config);
}
}