Add .gitignore.

.gitignore

@@ -0,0 +1,24 @@
+# Ignore Google Cloud credentials and API keys
+.streamlit/secrets.toml
+temp_credentials.json
+
+# Ignore downloaded files (FAISS, metadata, embeddings)
+metadata.jsonl
+faiss_index.faiss
+text_chunks.txt
+all_embeddings.npy
+
+# Python cache files
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+*.ipynb_checkpoints/
+
+# Virtual environment (if using one locally)
+venv/
+.env
+
+# Logs & temp files
+logs/
+*.log