FastAPI endpoint

[epogrebnyak]

def trial_balance(accounts: list[str], re: str, t: list[str]):
   """Return trial balance, balance sheet, and income statement."""
   return dict(accounts=accounts, retained_earnings_account=re, ttransactions=t)

Should accept:

?accounts=asset:cash+capital:equity+contra:equity:ts&re=retained_earnings&t=cash,equity,500&t=cr:vat,20.8+cr:sales,100+dr:cash,120.8

for t:

&t=cr:vat,20.8+cr:sales,100+dr:cash,120.8
&t=cr:equity,500+dr:cash,500
&t=cash,equity,500