add: add folder create api

core/apps/counterparty/serializers/counterparty_folder.py

@@ -0,0 +1,23 @@
+from django.db import transaction
+
+from rest_framework import serializers
+
+from core.apps.counterparty.models import CounterpartyFolder
+
+
+class CounterpartyFolderListSerializer(serializers.ModelSerializer):
+    class Meta:
+        model = CounterpartyFolder
+        fields = [
+            'id', 'name'
+        ]
+
+
+class CounterpartyFolderCreateSerializer(serializers.Serializer):
+    name = serializers.CharField()
+
+    def create(self, validated_data):
+        with transaction.atomic():
+            return CounterpartyFolder.objects.create(
+                name=validated_data.get('name'),
+            )