fix: Simplify __init__.py to fix import error

code_chatbot/__init__.py

@@ -1,35 +1,8 @@
 """
 Code Chatbot - AI-powered codebase assistant.
-
-Core modules:
-- rag: Chat engine with RAG
-- indexer: Vector database indexing
-- chunker: AST-aware code chunking
-- merkle_tree: Incremental change detection
-- mcp_server/mcp_client: Code search & refactoring tools
-- agents/crews: Multi-agent workflows
 """
 
-# Core
-from .rag import ChatEngine
-from .config import get_default_config
-
-# Indexing
-from .indexer import Indexer
-from .chunker import CodeChunker
-
-# Tools
-from .mcp_client import MCPClient
-
-__all__ = [
-    # Core
-    'ChatEngine',
-    'get_default_config',
-    # Indexing
-    'Indexer',
-    'CodeChunker',
-    # Tools
-    'MCPClient',
-]
+# Keep imports minimal to avoid circular imports
+# Import on demand when needed
 
 __version__ = "2.0.0"