Handle \n, dedupe json cleaning into single function for reusability

Use placeholder for newline in json object values until json parsed
and values extracted. This is useful when research mode models outputs
multi-line codeblocks in queries etc.

src/khoj/processor/conversation/openai/gpt.py

@@ -12,9 +12,9 @@ from khoj.processor.conversation.openai.utils import (
     completion_with_backoff,
 )
 from khoj.processor.conversation.utils import (
+    clean_json,
     construct_structured_message,
     generate_chatml_messages_with_context,
-    remove_json_codeblock,
 )
 from khoj.utils.helpers import ConversationCommand, is_none_or_empty
 from khoj.utils.rawconfig import LocationData
@@ -95,8 +95,7 @@ def extract_questions(
 
     # Extract, Clean Message from GPT's Response
     try:
-        response = response.strip()
-        response = remove_json_codeblock(response)
+        response = clean_json(response)
         response = json.loads(response)
         response = [q.strip() for q in response["queries"] if q.strip()]
         if not isinstance(response, list) or not response: