translated the remaining german notes, python comments, help and messages to english (in-game strings, parsed report lines and cli values stay german)

tools/vorschau/label.py

@@ -1,4 +1,5 @@
-# label.py IN.png LABELS.json OUT.jpg "Titel" [breite]  -> beschriftete JPG-Vorschau
+# label.py IN.png LABELS.json OUT.jpg "Title" [width]  -> labelled JPG preview
+# (label names Start/Galerie/Gehege/Parkour/Ziel are the keys written by render_level.py)
 import sys, json
 from PIL import Image, ImageDraw, ImageFont
 src, lj, out, title = sys.argv[1:5]