Initial project scaffold: FastAPI + React/Vite + PostgreSQL SaaS starter

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

.gitignore

@@ -0,0 +1,19 @@
+# Python
+__pycache__/
+*.pyc
+.venv/
+dist/
+*.egg-info/
+
+# Env
+.env
+
+# Node
+node_modules/
+frontend/dist/
+
+# DB
+*.sqlite
+
+# OS
+.DS_Store