- Fix balance field description in NewAddressInfo common structure
- Update task::get_new_address::status response examples with correct balance format
- Update task::scan_for_new_addresses::status response examples with correct balance format
- Add examples showing both single-token and multi-token platform responses
- Balance field is a map/object with token tickers as keys, not a simple BalanceInfo object

The balance structure should be:
{
  "[TOKEN_TICKER]": {
    "spendable": "amount",
    "unspendable": "amount"
  }
}

Addresses issue where documentation showed incorrect balance format that didn't match actual API responses.