Fixed permissions on commands, so only help command can be run by all users. All other commands require op (level 4 permission). Also added more debug log output from commands, so it's logged on the server when a command is run.

- Load API url, key, model, and other settings from config file (creaturechat.json)
- Expanded our Config class to include other API settings, such as context length and output length.
- Include 20 generated funny error messages

Updating commands to add optional --config server, or --config default. Also adding configuration handler to actually create and load config files.

/creaturechat key set <key>
/creaturechat url set "<url>"
/creaturechat model set <model>
/creaturechat help