Add issue templates and PR template for contributors

Overhaul README: comparison table, insights examples, contributor guide

Export sql and escapeSQL helpers for insights engine

Add /cost-insights skill with waste, roi, savings, anomaly, badge commands

Add insights engine: efficiency score, waste detection, ROI, anomaly detection

Release v2.0.0: security fixes, branch costs, model comparison, export

Update all skills with v2 commands: export, branch, multi-model

Fix budget guard quoting and add session start summary hook

Add branch report, model breakdown, projected monthly, day-of-week labels

Upgrade estimator with configurable multipliers and per-tool feedback

Rewrite storage layer with security fixes and new features

Expand pricing to 8 models with multi-model comparison

Fix marketplace source path: use './' instead of '.'

Remove assets from repo and add to .gitignore

Add terminal-style screenshot for Reddit and social posts