Set default value of show_interface_labels to True

Change the default value of show_interface_labels from False to True for better user experience, as interface labels are commonly used in network topology visualization.

gns3server/controller/project.py

@@ -95,7 +95,7 @@ class Project:
         show_grid=False,
         grid_size=75,
         drawing_grid_size=25,
-        show_interface_labels=False,
+        show_interface_labels=True,
         variables=None,
         supplier=None,
         created_by=None,