[WIP] Slash commands compatibility

[lyricalsoul]

TODO:

• [ ] Fix the CommandRules class
• [ ] Clean up the code (currently very messy, specially the Discord payload generators)
• [ ] Check if parameter has the property whitelist - if so, send the argument as a choice, with its possible values as the values inside the whitelist
• [ ] Do some extensive testing
• [ ] Try to figure out what to put in the command options description
• [ ] Remove more 32 commands (132 total, but 100 is max amount of global CHAT_INPUT interactions)