Rotate DefaultGrid on round start (#4957)

* Rotate DefaultGrid on round start

Not ideal long-term but good for bugspotting short-term.

* Fix buckle test

Because gridtraversal was being triggered the pos was being fucked when moving back

* Fix buckle

* Buckle offset

Content.Shared/CCVar/CCVars.cs

@@ -90,6 +90,12 @@ namespace Content.Shared.CCVar
         public static readonly CVarDef<float> MaxStationOffset =
             CVarDef.Create("game.maxstationoffset", 1000.0f);
 
+        /// <summary>
+        ///     Whether a random rotation will be applied to the station on roundstart.
+        /// </summary>
+        public static readonly CVarDef<bool> StationRotation =
+            CVarDef.Create("game.station_rotation", true);
+
         /// <summary>
         ///     When enabled, guests will be assigned permanent UIDs and will have their preferences stored.
         /// </summary>