[Feature Request] GPU support for Pyodide.

As an example: TensorFlow.js supports a variety of platforms and backends, including:

• TensorFlow.js CPU Backend, pure-JS backend for Node.js and the browser.
• TensorFlow.js WebGL Backend, WebGL backend for the browser.
• TensorFlow.js WASM Backend, WebAssembly backend for the browser.
• TensorFlow.js WebGPU, WebGPU backend for the browser.
• TensorFlow.js Node, Node.js platform via TensorFlow C++ adapter.
• TensorFlow.js React Native, React Native platform via expo-gl adapter.

This supports both training (fine-tuning existing models) and inference, in browser-based contexts. Would it be possible to add in-browser GPU support for Pyodide via WebGPU?