Add CSV export feature to data dashboard

[hcientist]

• Change the template so that it includes a link to a new django view that responds with the CSV file. Likely the new view should be similar to or even invoke the view that is already at https://github.com/Lab-Lab-Lab/CPR-Music-Backend-hcientist/blob/dashboard/teleband/dashboards/views.py

see reference: https://docs.djangoproject.com/en/5.0/howto/outputting-csv/#using-the-python-csv-library