[Feature] 权限管理-> 远程应用 添加 api (#4040)

* [Feature] 权限管理-> 远程应用 添加 api

* [Feature] 添加 RelationMixin

apps/perms/serializers/base.py

@@ -0,0 +1,13 @@
+from rest_framework import serializers
+
+
+class PermissionAllUserSerializer(serializers.Serializer):
+    user = serializers.UUIDField(read_only=True, source='id')
+    user_display = serializers.SerializerMethodField()
+
+    class Meta:
+        only_fields = ['id', 'username', 'name']
+
+    @staticmethod
+    def get_user_display(obj):
+        return str(obj)