[service_desk] Single request_type method addition

Added new method to fetch single request type.

Author: clmoreno

atlassian/service_desk.py

@@ -166,7 +166,23 @@ def get_request_types(self, service_desk_id):
             f"rest/servicedeskapi/servicedesk/{service_desk_id}/requesttype",
             headers=self.experimental_headers,
         )
+    def get_request_type(self, service_desk_id, request_type_id):
+        """
+        Fetches detailed information about a specific request type within a service desk.
 
+        :param service_desk_id: The ID of the service desk where the request type
+            exists.
+        :type service_desk_id: str
+        :param request_type_id: The ID of the request type to retrieve.
+        :type request_type_id: str
+        :return: A dictionary containing the details of the specified request type.
+        :rtype: dict
+        """
+        return self.get(
+            f"rest/servicedeskapi/servicedesk/{service_desk_id}/requesttype/{request_type_id}",
+            headers=self.experimental_headers,
+        )
+        
     # Participants actions
     def get_request_participants(self, issue_id_or_key, start=0, limit=50):
         """