Add support for Ollama streaming output and integrate Open-WebUI as the chat UI demo

lightrag/base.py

@@ -19,6 +19,7 @@ class QueryParam:
     only_need_context: bool = False
     only_need_prompt: bool = False
     response_type: str = "Multiple Paragraphs"
+    stream: bool = False
     # Number of top-k items to retrieve; corresponds to entities in "local" mode and relationships in "global" mode.
     top_k: int = 60
     # Number of document chunks to retrieve.