- Reorganize the library structure
- Use the latest version of `wasi-nn` wit (Oct 25, 2022):
https://github.com/WebAssembly/wasi-nn/blob/0f77c48ec195748990ff67928a4b3eef5f16c2de/wasi-nn.wit.md
- Split logic that converts WASM structs to native structs in a separate file
- Simplify addition of new frameworks