Module pi_wasm 

PiWasm: WebAssembly polyfill for QuickJS runtime.

Provides globalThis.WebAssembly inside QuickJS, backed by wasmtime. Enables JS extensions to use WebAssembly modules (e.g., Emscripten-compiled code) even though QuickJS lacks native WebAssembly support.

Architecture:

• Native Rust functions (__pi_wasm_*) handle compile/instantiate/call
• A JS polyfill wraps them into the standard WebAssembly namespace
• Memory is synced as ArrayBuffer snapshots (wasmtime → JS) via a getter