Add support for investment accounts #4
Description
Transactions in investment accounts are handled differently from other transactions in plaid. The endpoint is different, as is the data model. Plaid doesn't have a sync functionality (with a cursor) for investment transactions.
Given a TRUE/FALSE value for an investment_account value in the config file, output beancount-compatible transactions, assuming a commodity has been set up in the beancount file that matches each security's ticker. Emulate syncing behavior if the user enters plaid2text -s