Base Model für CITT erstellt, PTM Dortmund ergänzt, Tests hinzugefügt

src/paveit/helper/filehandling.py

@@ -0,0 +1,12 @@
+import logging
+from io import BytesIO
+
+logger = logging.getLogger(__name__)
+
+
+def read_file_to_bytesio(filename: str):
+    
+    with open(filename, "rb") as fh:
+        buf = BytesIO(fh.read())
+    
+    return buf