Move apps in main directory

Signed-off-by: Emmy D'Anello <emmy.danello@animath.fr>

registration/migrations/0005_studentregistration_vaccine_sheet.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.18 on 2023-02-19 23:38
+
+from django.db import migrations, models
+import registration.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('registration', '0004_volunteer_admin'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='studentregistration',
+            name='vaccine_sheet',
+            field=models.FileField(blank=True, default='', upload_to=registration.models.get_random_vaccine_filename, verbose_name='vaccine sheet'),
+        ),
+    ]