Capordino Cleanup

[selenaxiao-nist]

Starting thoughts for cleaning up Capordino, expanding features

Removing CyberESI:
CLI code contains the option to call the GUI code contained in CyberESI. Removing that involves removing the capordino gui subcommand. A simple deletion that won't affect other areas.

Expanding to 800-53:
CLI code currently only builds CSF 2.0 catalog in the main function. Will require more work to generalize, creating sub functions to take in framework options.
Conversion backend code is already separated into folders java/gov/nist/capordino/conversion/. Adding more frameworks involves adding new classes in a new folder.