Configuration file fixes and improvements

[GhostofGoes]

This fixes issues with the configuration file

Summary:

• Added config file to the package
• Added ability for user to use their own config file using the -c/--config CLI argument
• If the user doesn't specify a config, the one in the current directory, the package, or the user's home directory will be used (in that order)
• Moved DEBUG out of global and into the class

Also, I have a tendency to either use c-style strings if f-strings aren't available. If you prefer .format, I'm happy to make the appropriate changes.

[GhostofGoes]

😆