Cmj.wasm test

[ChiaMineJP]

Experimental PR to make chia-protocol available as a wasm module.
Current status:

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Building wasm module only with struct / enum succeeded

Steps to reproduce:

1. Make sure you have wasm-pack installed on your system. (Just invoke cargo add wasm-pack to install)
2. cd chia-protocol
3. wasm-pack build

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To convert methods with fixed sized byte array arguments/return value like &[u8; 4], we need to wait wasm-bindgen' update

rustwasm/wasm-bindgen#3458

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u128 not supported yet by wasm-bindgen

wasm-bindgen does not yet support u128 so only when compiling for wasm32 the type will be converted to u64 temporarily by #[wasm_patch::conv_u128_to_u64_for_wasm] proc macro attritute.

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BytesImpl should not be used outside chia-protocol/src/bytes.rs

BytesImpl<T> is basically aliased to types like Bytes32, Bytes48, and so on.
Since wasm-bindgen cannot treat generic parameters well when it is converting rust code to wasm, please do not use BytesImpl<T> notation outside bytes.rs.

[Rigidity]

Is it fine to close this? This is quite out of date

[ChiaMineJP]

@Rigidity Yes, this's too old. Closing.