[New Feature] Retrieve balance account

[HadesGuard]

Now the CLI does not support retrieving the balance account. Solution:

1. Implement formatBalanceToNumber function: convert amount in 10e18 to human amount.
2. Implement balance function by API.
3. Define new command naming balance with action(balance):

[cpp-phoenix]

Hey @QEDK, You can assign it to me if you aren't working on it rn

[Laedrianus]

None yet