✨ Add option to hide/show week days on calendar

Fixes Calendar Weekdays line #1091

public/locales/en/modules/calendar.json

@@ -12,7 +12,10 @@
       },
       "radarrReleaseType": {
         "label": "Radarr release type"
+      },
+      "hideWeekDays": {
+        "label": "Hide week days"
       }
     }
   }
-}
+}