Context menu commands & paged MessageEmbed helper

[Sv443]

• [x] Add support for context menu commands
• [x] Add helper class that creates a paginated MessageEmbed (closes #35)
  • [x] Support dynamically changing pages
• [x] Moved utility files and classes into new path @src/utils
• [x] Moved assets into new path @src/assets so they can be imported
• [x] Refactor Command class
  • [x] Fix types
  • [x] Improve errors
  • [x] Add devOnly command meta prop
  • [x] Add choices prop for command args of type number
• [x] Add command npm run win-redis to start redis in a separate wsl window
  • File tools/redis.bat can be used to autostart redis with Task Scheduler (refer to guide)
• [x] Better sorting in /define urbandict

[canarado]

Cool and gude