GS4 Currency support BANK options

[mrhoribu]

Allow for Lich::Currency.bank support so that you can query bank details. Infomon should be able to parse BANK ACCOUNT as well as the responses from each town's bank for CHECK BALANCE. Possibly adding something like the following to support referencing all banks or a specific one by name or city.

def self.bank(town: 'all')
  case town
  when 'all'
    return [
      Infomon.get('currency.first_elanith_secured_bank'),
      Infomon.get('currency.icemule_trace_bank'),
      Infomon.get('great_bank_of_kharam_dzu'),
      Infomon.get('vornavis_bank_of_solhaven'),
      Infomon.get('bank_of_kharag doth_dzulthu'),
      Infomon.get('united_city_states_bank'),
      Infomon.get('bank_of_torre_county'),
      Infomon.get('four_winds_bank'),
      Infomon.get('krakens_fall_bank')
    ]
  when /wehnimer|elanith/i
    return Infomon.get('currency.first_elanith_secured_bank')
  end
end