Autocomplete refactoring

* refactors konova/autocompletes.py by splitting into individual files and moving them to fitting apps
     * autocomplete files now live in APPNAME/autocomplete/...

codelist/autocomplete/handler.py

@@ -0,0 +1,24 @@
+"""
+Author: Michel Peltriaux
+Organization: Struktur- und Genehmigungsdirektion Nord, Rhineland-Palatinate, Germany
+Contact: ksp-servicestelle@sgdnord.rlp.de
+Created on: 18.08.22
+
+"""
+from codelist.settings import CODELIST_HANDLER_ID
+from codelist.autocomplete.base import KonovaCodeAutocomplete
+
+
+class HandlerCodeAutocomplete(KonovaCodeAutocomplete):
+    """
+    Due to limitations of the django dal package, we need to subclass for each code list
+    """
+    group_by_related = "parent"
+    related_field_name = "long_name"
+
+    def __init__(self, *args, **kwargs):
+        self.c = CODELIST_HANDLER_ID
+        super().__init__(*args, **kwargs)
+
+    def get_result_label(self, result):
+        return result.long_name