Initial commit: AI Coding Starter Kit v1.3.0 (Production-Ready)

Features:
- Next.js 16 + TypeScript + Tailwind CSS
- 6 Production-Ready AI Agents (Requirements → Deployment)
- Production Guides (Error Tracking, Security, Performance, Scaling)
- Feature Changelog System (Code Reuse)
- PM-Friendly Documentation
- Supabase-Ready (optional)
- shadcn/ui-Ready
- Vercel Deployment-Ready

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.env.local.example

@@ -0,0 +1,9 @@
+# Supabase (Optional - remove if not using backend)
+NEXT_PUBLIC_SUPABASE_URL=your_supabase_url_here
+NEXT_PUBLIC_SUPABASE_ANON_KEY=your_supabase_anon_key_here
+
+# Add more environment variables as needed
+# STRIPE_SECRET_KEY=sk_...
+# SMTP_HOST=smtp.sendgrid.net
+# SMTP_USER=your_smtp_user
+# SMTP_PASS=your_smtp_password