[Feature] Add BHP, Pedersen, and Poseidon hash function implementations to the Provable SDK.

[iamalwaysuncomfortable]

Motivation

This PR adds BHP, Pedersen and Poseidon hash function impls to Provable SDK. This proposed functionality enables JS developers to use the Aleo implementations of these hash functions within their dapps.

These hash exports are useful (but not limited to) the following use-cases.

• Deriving record and ciphertext view keys for private key owners: Some apps such as wallet impls may want to be able to view plaintexts of ciphertexts on chain on behalf of a private key holder in order to execute critical functionality based on that hidden value.
• Implementing client side cryptography: Apps may want to be able to implement hash-function based cryptography client-side compatible with their private dapps such as creating private randomness, decoding elements that have been encoded within a circuit or finalize block, etc.
• Research: Exporting hash functions for researchers who desire to experiment with BHP, Pedersen or Poseidon hash functions.

Changelog

• Implements individual hashing objects BHP256, BHP512, BHP768, BHP1024, Pedersen64, Pedersen128, Poseidon2, Poseidon4, and Poseidon8. The current rationale behind this is to enable different domain separators to ensure dapps implementing these hash functions within offchain protocols in their dapp do not share a global domain (which may lead to vulnerabilities such as witness discovery).
• Adds a utilities module that provides macros for converting js arrays of protocol objects to vectors of corresponding objects in rust & wasm
• Implements convenience methods on the Ciphertext object to enable decryption of ciphertexts from transition inputs or outputs by the key ViewKey holder.

Test Plan

• Adds tests within the wasm SDK to ensure the exported wasm implementations match the native hashing impls.
• Adds test vectors within the JS SDK to ensure hashing within javascript matches expected outputs

[jaketarnow]

LGTM

[Pauan]

A few minor comments

[Pauan]

I think this can use .iter() instead of .to_vec().into_iter()

[Pauan]

I think this can use .iter() instead of .to_vec().iter()

[Pauan]

It's better to use .collect::<js_sys::Array> instead of manually pushing.