move wei script to wei app

apps/wei/management/commands/wei_algorithm.py

@@ -0,0 +1,15 @@
+# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from django.core.management import BaseCommand
+from wei.forms import CurrentSurvey
+
+
+class Command(BaseCommand):
+    help = "Attribute to each first year member a bus for the WEI"
+
+    def handle(self, *args, **options):
+        """
+        Run the WEI algorithm to attribute a bus to each first year member.
+        """
+        CurrentSurvey.get_algorithm_class()().run_algorithm()