refactor: use english for routes, parameters and internal messages

templates/board/plan/_desk.html.twig

@@ -13,7 +13,7 @@
     'desk-07': { x:  40, y: 260 }, 'desk-08': { x: 200, y: 260 }, 'desk-09': { x: 360, y: 260 },
     'desk-10': { x:  40, y: 360 }, 'desk-11': { x: 200, y: 360 }, 'desk-12': { x: 360, y: 360 }
 } %}
-{% set time_params = selected_time.allDay ? {} : { von: selected_time.start, bis: selected_time.end } %}
+{% set time_params = selected_time.allDay ? {} : { from: selected_time.start, to: selected_time.end } %}
 
 <svg viewBox="0 0 520 460" class="w-full h-auto" role="img" aria-label="Raumplan Büro">
     <rect x="10" y="20" width="500" height="420" rx="8" class="fill-white stroke-gray-300" stroke-width="2"></rect>