Initial project scaffold

Full-stack Dutch supermarket price tracker with FastAPI backend,
PostgreSQL/SQLAlchemy, Albert Heijn scraper, and Next.js frontend.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,31 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+.venv/
+venv/
+.env
+*.egg-info/
+dist/
+build/
+
+# Alembic
+backend/alembic/versions/*.pyc
+
+# Node
+frontend/node_modules/
+frontend/.next/
+frontend/.env.local
+frontend/.env*.local
+
+# Docker
+.dockerignore
+
+# OS
+.DS_Store
+Thumbs.db
+
+# IDE
+.idea/
+.vscode/
+*.swp