Improve warnings

[conaticus]

• Change /verbal to /warn
• Count warnings in a database
• Display warnings in an embed (/warnings [user]) - returns count of warnings for a user
  • Make it hidden to only the command executor
  • MANAGE_MESSAGES only
  • Verbose option that displays all warnings in pages, including the dates, reasons, moderators etc - we might need a web dash for this in future
• Remove specific warnings (ADMINISTRATOR)
• Remove all warnings (ADMINISTRATOR)