style: sort imports in the new image management modules

gns3server/schemas/controller/images.py

@@ -14,9 +14,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from enum import Enum
 from datetime import datetime
-from typing import Optional, Literal
+from enum import Enum
+from typing import Literal, Optional
 
 from pydantic import BaseModel, ConfigDict, Field