Add `lann/wasm-wave` to crates

[pchickey]

This is an import of https://github.com/lann/wasm-wave to a new home in this repository!

I imported the code at release 0.6.0 to crates/wasm-wave

I made minor fixes to:

• fit in workspace
• delete dependency on wasmtime (those trait impls will be upstreamed into the wasmtime crate under a flag once this lands)
• and fix some benign warnings https://github.com/lann/wasm-wave/pull/36
• replace the use of snapbox/tryfn in the tests with a bespoke implementation, because snapbox and some of its deps dont support wasm32-wasi and the functionality the tests were really using from that crate was pretty minor.

[pchickey]

@lann would appreciate your review and approval on this as well!