Initial commit with full functionality extend app req tools

tools/__init__.py

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+# tools/__init__.py
+# This file is intentionally empty to make the directory a Python package

tools/final_answer.py

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+# tools/final_answer.py
+from typing import Any
+
+class FinalAnswerTool:
+    def __call__(self, answer: str) -> str:
+        """Tool to provide a final answer
+        Args:
+            answer: The final answer to return
+        """
+        return answer
+
+    def __str__(self) -> str:
+        return "final_answer"