feat: add hyperframes-style animated chart

Based on hyperframes.heygen.com catalog effects:
- GSAP-powered timeline animations
- Gradient line chart with area fill
- Pulsing data points with glow effects
- Staggered entrance animations
- Grid overlay pattern
- Ambient glow backgrounds
- Dark theme with indigo→cyan gradient
- Metric cards row
- Professional typography

Author: Subhajit das