[SDK] Implement SDK as TS package

[1Mateus]

Implement the described SDK as a TS package that can be used in front and backend by other projects.

*This is a megatask - must be broken down before assignment. Create one task for each method in the SDK.

[veigajoao]

Regarding railgun prover:

• [x] Validar se conseguimos usar o native prover no browser usando o reailgun-engine
• [x] Validar se conseguimos usar a SDK deles para salvar o arquivo de forma mais leve - rápida - e persistir no estado
• [x] Construir uma interface do nosso circuito pra ser chamada pelo node/web

[veigajoao]

• [x] Separar interfaces em módulos
• [x] Interação com o circuito
• [x] Interação com o contrato
• [x] Interação com indexer

[1Mateus]

Key derivation

• [x] Bip39
• [x] poseidon
• [x] Wallet HDnode
• [x] Tests

Encryptation

• [x] Encrypt
• [x] Decrypt
• [x] Tests

Merkletree

• [x] Base Merkletree lib
• [x] Tests

UTXOs

• [x] Generate proof inputs
• [x] Generate proof
• [x] Create transaction params
• [x] Tests

Metadatas

• [x] Download and cache metadatas to cache (UTXOs, circuit wasm, tokens, etc) with indexedDB

Metadatas

• [x] Snarkjs.min.js
• [x] Base array of tokens to deposit
• [x] Stubs to make dummy transactions

CI

• [x] Run all test and validate TS
• [ ] Dispatch command to create new release
• [ ] Automate publish new versions

Publish

• [ ] Publish SDK