Support for wasm32-wasi

[broodroosterdev]

As of Python 3.13, the wasm32-wasi target is a tier 2 platform: https://peps.python.org/pep-0011/#tier-2
What would be needed for wasm32-wasi to be supported by maturin? I have seen it mentioned in earlier issues, so maybe now would be a good time to research this: #904 (comment)

I am trying to use certain packages that use maturin to build python dynamic modules, and having wasm32-wasi support would help these packages become wasm32-wasi compatible.

Thank you for your help 😄

[messense]

Pull requests are welcome to add support for it!