History / Multi Dataset Experiments

Update wiki for merged branches — remove stale branch references - TUI-Dashboard: branch → master, remove checkout instructions - Multi-Dataset-Experiments: branch → master, fix doc URLs - Home: FineWeb-Edu branch → master, fix evaluating-results URL Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Add multi-dataset experiment framework wiki page Reference karpathy/autoresearch PR #303 (evaluating results at scale). Add Multi-Dataset-Experiments page with architecture, usage, and early climbmix vs FineWeb-Edu comparison results. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>