feat/get all balances

[genaroibc]

Description

closes #223

Add methods to get EVM and Cosmos token balances.

const squid = new Squid({
  baseUrl: "https://v2.api.squidrouter.com",
  integratorId: "squid-test"
});

await squid.init();

const cosmos = await squid.getAllCosmosBalances({
  addresses: [
    {
      chainId: "cosmoshub",
      address: "cosmos1awrua7e2kj69d7vn5qt5tccrhavmj9xajl58pw",
      coinType: 118
    }
  ]
});

const evmBalances = await squid.getAllEvmBalances({
  userAddress: "0x9a32549df3ff3c1fd725f81093c47445218de723",
  chains: [1, 43114, 8453]
});

getAllBalances

const balances = await squid.getAllBalances({
  chainIds: [1, 43114, "osmosis-1", "cosmoshub-4"],
  evmAddress: "0x344b63c2BcB4B61765083735e8F49Bb203415a33",
  cosmosAddresses: [
    {
      address: "cosmos1awrua7e2kj69d7vn5qt5tccrhavmj9xajl58pw",
      chainId: "cosmoshub-4",
      coinType: 118
    }
  ]
});

// result
{
  cosmos: [
    {
      balance: "676727870",
      denom: "ibc/E6931F78057F7CC5DA0FD6CEF82FF39373A6E0452BF1FD76910B93292CF356C1",
      chainId: "osmosis-1",
      decimals: 6
    }, {
      balance: "5987424",
      denom: "uosmo",
      chainId: "osmosis-1",
      decimals: 6
    }, {
      balance: "1804685",
      denom: "uatom",
      chainId: "cosmoshub-4",
      decimals: 6
    }
  ],
  evm: [
    {
      symbol: "USDC",
      address: "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
      decimals: 6,
      balance: "1549424225"
    }, {
      symbol: "AVAX",
      address: "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
      decimals: 18,
      balance: "41345097216001030"
    }, {
      symbol: "ETH",
      address: "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE",
      decimals: 18,
      balance: "41345097216001030"
    }
  ]
}

Type of change

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[odcey]

I would unify the response

• adding decimals on cosmos item
• naming balance instead of amount for cosmos to be the same as evm

[jmdev3]

LGTM! Good work

[ecdsafu]

Exciting to have this ready, thanks a lot @genaroibc !

Could you please update the PR comments to reflect the updated interface?

[genaroibc]

Updated!