Add RAG pipeline for code analysis and architecture insights

Author: TrixiRa

.gitignore

@@ -23,3 +23,24 @@ site-content
 # NetBeans files
 nb-configuration.xml
 nbactions.xml
+
+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+venv/
+.venv/
+ENV/
+env/
+*.egg-info/
+.eggs/
+dist/
+build/
+
+# RAG index files (large, can be regenerated)
+rag/index/
+
+# Pytest
+.pytest_cache/