chore: add .gitignore.

.gitignore

@@ -0,0 +1,44 @@
+# Secrets
+.env
+.env.local
+.env.*.local
+*.env
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+*.pyd
+.Python
+*.egg-info/
+dist/
+build/
+.venv/
+venv/
+env/
+
+# Node
+node_modules/
+web/server/node_modules/
+web/client/node_modules/
+web/client/dist/
+web/client/.vite/
+
+# Data / models
+data/processed/embeddings.npy
+data/processed/faiss.index
+
+# OS
+.DS_Store
+Thumbs.db
+desktop.ini
+
+# Editor
+.vscode/settings.json
+.idea/
+*.swp
+*.swo
+
+# Logs
+*.log
+npm-debug.log*