Plaid Get investment transactions

The `/investments/transactions/get` endpoint allows developers to retrieve up to 24 months of user-authorized transaction data for investment accounts. Transactions are returned in reverse-chronological order, and the sequence of transaction ordering is stable and will not shift. Due to the potentially large number of investment transactions associated with an Item, results are paginated. Manipulate the count and offset parameters in conjunction with the `total_investment_transactions` resp...