Adds rainbow styles, custom skins, and auto-join functionality to Bonk.io. Activated via commands.
/rainbowstyle: Toggles the rainbow rectangle and opposite name/level colors.
/autojoin: Enables auto-join for available games.
/customizeui: Placeholder for customizing the game's UI.
/sethotkeys: Placeholder for setting custom hotkeys.
/chatboost: Highlights specific chat messages (e.g., those with !).
/setskin: Prompts for a custom skin color in hex format (e.g., #ff0000).
/autoplay: Automates simple gameplay actions like jumping.
