add party model

core/apps/orders/admin/__init__.py

@@ -1,2 +1,3 @@
 from .order import *
-from .offer import *
+from .offer import *
+from .party import *

core/apps/orders/admin/party.py

@@ -0,0 +1,9 @@
+from django.contrib import admin
+
+from core.apps.orders.models import Party
+
+
+@admin.register(Party)
+class PartyAdmin(admin.ModelAdmin):
+    list_display = ['mediator', 'delivery_date', 'payment_date']
+