Refactoring

* splits intervention/models.py into subpackage

intervention/models/__init__.py

@@ -0,0 +1,12 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: michel.peltriaux@sgdnord.rlp.de
+Created on: 15.11.21
+
+"""
+
+from .intervention import *
+from .legal import *
+from .revocation import *
+from .responsibility import *