Document everything

[shi-gg]

• Greetings
• Passport
• Farewell
• Starboard
• YouTube Notifications
• Text to Speech
• Dailyposts (awaiting https://github.com/Luna-devv/mellow-bot/pull/9)
• Spotify (connect, commands; awaiting spotify verification)
• Updating Leaderboards
• Rank cards (bg, colors)
• Tags aka Custom Commands
• NSFW Moderation (awaiting aura to fix)
• Audio Moderation (awaiting me to add)
• Miscs (embed message links)
• All the slash commands (probably automated)

Being worked on in #19

[shi-gg]

@drijonh