Lifecycle Improvements

[Sidpatchy]

General ideas for improvements, this needs to wait until after moving away from Javacord (#6).

• Health monitoring
• Error recovery
  • Ensure features can work independent of each other.
    • Commands that don't need the database should run when it is inaccessible.
  • If a feature is known to be broken, inform the user of that instead of failing silently.
    • NEVER fail silently
• Feature flags
• Graceful shutdown
• Hot reloading
  • Allow updating configuration without a full restart
• Update notifications