Feature Request: Smooth Animations

The current Tic-Tac-Toe gameplay feels static, with marks appearing instantly. Adding smooth animations for placing Xs and Os, along with winning-line or celebration effects, can make the game more engaging and visually appealing. Subtle motion improves player feedback and provides a polished, professional experience.

### 🎯 Proposed Solution
- Use **CSS or Framer Motion** animations for X/O placement.
- Animate the **winning line** to draw smoothly across the board when a player wins.
- Add short celebratory effects like a confetti burst or board highlight on game completion.
- Maintain quick, responsive performance without lag.

### ✅ Expected Behavior
- Marks fade, slide, or bounce into place when selected.
- The winning line animates visibly rather than appearing instantly.
- A light celebratory animation plays when the game ends in a win or draw.
- Users perceive smoother, more satisfying visual transitions.