Create a Command class

[jaARke]

Using a class to define commands, rather than functions, will likely make it easier for users to define their own commands. Custom commands could extend this class or use decorators to invoke a higher-tier function responsible for adding each command to the CommandRegistry. Further, this organization would more closely resemble that of the slash-create library.

Command objects should hold information including:

• Command name
• Command description
• Command inputs
• Subcommand membership
• Function to be run when the command is invoked (run() or something similar)