Permission rethinking

* No detailed permissions due to django constraints on model-based permissions
* instead: logic controlled permission by group membership
* adds translations

konova/utils/user_checks.py

@@ -0,0 +1,21 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: michel.peltriaux@sgdnord.rlp.de
+Created on: 02.07.21
+
+"""
+from django.contrib.auth.models import User
+
+
+def in_group(user: User, group: str) -> bool:
+    """ Checks if the user is part of a group
+
+    Args:
+        user (User): The user object
+        group (str): The group's name
+
+    Returns:
+        bool
+    """
+    return group in user.groups.values("name")