Export the rust version to WASM + Use it in a Go library

[ngotchac]

This is just a PoC of what it could look like to export to WASM and use it in a Go library. Please don't hesitate to close this if it's not a wanted path forward. Note that the WASM build could also be used in the JS library (effortlessly) as well as for Python I guess, which would lower the burden of maintaining the code.

[cdump]

Hi! I created an R&D issue (https://github.com/cdump/evmole/issues/9) just 3 hours before your PR. I will continue researching WASM vs native library options and will extend this research to the Go language as well. Thank you. Let's keep this PR open while the R&D is in progress.

[ngotchac]

I created an R&D issue (#9) just 3 hours before your PR.

Ah nice aha, great timing!