Support Beancount multi-currency transactions with @ and @@ #1

Hello developer! Looking for a convenient tool to quickly generate Beancount transactions and I found this projects. Is there any plan to support @ and @@ syntax in Beancount to generate precise multi-currency transactions? For instance:

2026-03-04 "Transfer from USD to CNY"
  Assets:Bank:BofA  -1400 USD @@  200 CNY
  Assets:Bank:BankOfChina  200 CNY

I've discovered test code in your repository but it was commented out.