Add add_class registrations for 14 types defined in types.rs but missing
from mod.rs: SubmitOrderResponse, CashInfo, AccountBalance, CashFlowDirection,
CashFlow, FundPositionsResponse, FundPositionChannel, FundPosition,
StockPositionsResponse, StockPositionChannel, StockPosition (trade),
and CapitalDistribution, Subscription, OptionDirection, QuotePackageDetail (quote).