12216 Add color to circuit-type and add to SVG rendering (#14098)

* 12216 add color to model

* 12216 add forms, serializers for color

* 12216 color to detail view, add type to svg

* 12216 add color to svg

* 12216 review changes

netbox/dcim/svg/cables.py

@@ -159,6 +159,7 @@ class CableTraceSVG:
             labels.append(location_label)
         elif instance._meta.model_name == 'circuit':
             labels[0] = f'Circuit {instance}'
+            labels.append(instance.type)
             labels.append(instance.provider)
             if instance.description:
                 labels.append(instance.description)
@@ -181,6 +182,8 @@ class CableTraceSVG:
         if hasattr(instance, 'role'):
             # Device
             return instance.role.color
+        elif instance._meta.model_name == 'circuit' and instance.type.color:
+            return instance.type.color
         else:
             # Other parent object
             return 'e0e0e0'