Implement addressIndexes parameter in the getBalances RPC

[andreabadesso]

We didn't implement this in the part 2 of the RPC implementation because we don't have a single method that returns a GetBalanceObject for a token in a given address

We could do multiple calls on existing methods, but I think the ideal would be to have this method in the lib.

This is the GetBalanceObject type:

export interface GetBalanceObject {
    token: TokenInfo;
    balance: Balance;
    tokenAuthorities: AuthoritiesBalance;
    transactions: number;
    lockExpires: number | null;
}

• token(TokenInfo): We can get it using wallet.getTokenDetails(token);
• balance(Balance): We can get it using await wallet.getAddressInfo(address, { token })
• tokenAuthorities(AuthoritiesBalance): This is a hard one, we do have a method to get the authority utxos for a given token (getAuthorityUtxos), but we don't have a mechanism for filtering authorities for a given address. My suggestion would be to refactor getMintAuthority and getMeltAuthority to accept an option filter_method which would be passed down to this.store.selectUtxos as a UtxoFilterOptions option. We would have to implement it in the new facade differently, probably using the same method in the wallet-service lambda.
• transactions: this comes from the getTokenDetails method.
• lockExpires: I'm not sure, would require a deeper investigation, I couldn't find a method that returns lockExpires for a given address and token