Create James-specific, faster web proxy [wasm]

[mitchhentges]

hoxy is phenomenal, but isn't the most performant - at higher workloads, hoxy seems to be the component that is causing the greatest strain in James.

We should implement a small little wasm proxy that will provide the functionality of hoxy that we use, while being minimal and fast.

Since we'll control the proxy, this will also make issues like #399 directly solvable