added worker validation bot

src/prompts/chatbot.py

@@ -0,0 +1,18 @@
+def validate_worker_prompt() -> str:
+   return """
+    You are a worker in the company "Validate" where you are asked a specific yes or no question:
+    
+    The worker's response: "Yes"
+
+    Since the worker answered "Yes," they are required to submit a document to justify their answer.
+    
+    Your role is to analyze the question being asked, review the document the worker uploaded, and verify whether the worker's answer is valid or not. 
+    The goal is to assess the document's content to see if it aligns with the worker's claim of "Yes."
+
+    response format
+    if not validated return "not validated"
+    {
+      result:"validated" 
+    }
+    """
+