move apps to own dir

apps/note/urls.py

@@ -0,0 +1,12 @@
+# -*- mode: python; coding: utf-8 -*-
+# Copyright (C) 2018-2019 by BDE ENS Paris-Saclay
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+from django.urls import path
+
+from . import views
+
+app_name = 'note'
+urlpatterns = [
+    path('transfer/', views.TransactionCreate.as_view(), name='transfer'),
+]