Removing LangChain and Rebuilding Executor (#1322)

* rebuilding executor

* removing langchain

* Making all tests good

* fixing types and adding ability for nor using system prompts

* improving types

* pleasing the types gods

* pleasing the types gods

* fixing parser, tools and executor

* making sure all tests pass

* final pass

* fixing type

* Updating Docs

* preparing to cut new version

src/crewai/cli/authentication/utils.py

@@ -79,7 +79,7 @@ class TokenManager:
         """
         encrypted_data = self.read_secure_file(self.file_path)
 
-        decrypted_data = self.fernet.decrypt(encrypted_data)
+        decrypted_data = self.fernet.decrypt(encrypted_data)  # type: ignore
         data = json.loads(decrypted_data)
 
         expiration = datetime.fromisoformat(data["expiration"])