feat: add autonomous Layout Optimizer with simulated annealing

Interactive tool that automatically optimizes graph layouts:
- Simulated annealing minimizes edge crossings, edge length variance, node proximity
- 8 preset graphs (Petersen, K5, K3,3, Cube, Dodecahedron, Grid, Random, Bipartite)
- Real-time animation shows optimization progress
- Quality metrics dashboard (crossings, edge std, angular resolution, quality score)
- Configurable temperature, cooling rate, and speed controls
- Canvas-based editor: click to add nodes, click two to add edge, drag to move
- Auto-optimize on preset load option
- Custom graph input via adjacency list

Author: sauravbhattacharya001