Hello @woda,
Kansas State University has a tool you can use to turn a CSV into a QTI file. I would recommend following the instructions on this Northwestern University page for formatting the CSV for proper conversion. That page also includes a link to KSU's tool. You can then take the created QTI and use the Import Existing Content button from homepage of the course and choose to import a QTI package. There is a selection to create a new question bank.
This may also create a Quiz, but you can delete that if you do not want it.
Let us know how this goes for you so we know if it's a viable solution for others.
Best of luck,
James