feat: add activity feed and background effects

- Implemented ActivityFeed component to display real-time user activity including coding, music, and chat interactions.
- Added GooFilter and BackgroundBlobs components for enhanced visual effects.
- Updated layout to include new components and ensure proper stacking context.
- Enhanced Tailwind CSS configuration with new color and font settings.
- Created API route to mock activity data from n8n.
- Refactored main page structure to streamline component rendering.

components/LiquidCursor.tsx

@@ -0,0 +1,5 @@
+'use client';
+
+export const LiquidCursor = () => {
+  return null;
+};