This commit expands the documentation of the `Func` type as well as updating the Rust embedding tutorial with more recent APIs. I wanted to also leave space in the Rust tutorial to get more ambitious over time with what it's documenting, but I stopped around here, curious to see what others think about it!
Wasmtime Embedding API
The wasmtime crate is an embedding API of the wasmtime WebAssembly runtime.
This is intended to be used in Rust projects and provides a high-level API of
working with WebAssembly modules.
If you're interested in embedding wasmtime in other languages, you may wish to
take a look a the C embedding API instead!