Added the following features to the Form Data File Endpoint (api/datafiles) in the REST API:
- GET call to get a list of all Form Data Files
- GET call to get a list of all Form Data Files for a specific Folder
- GET call to get the details for a single Form Data File
- GET call to download a single Form Data File with options to to download the original file or the SQLite file
- DELETE call to delete a single Form Data File