Ghost z-levels move actions + mapping z-levels combine command (#654)

* some setup

* fast ghost zlevels-moving

* zlevel combine command for mapping

Content.Server/_CP14/ZLevels/EntitySystems/CP14StationZLevelsSystem.Actions.cs

@@ -0,0 +1,41 @@
+using System.Numerics;
+using Content.Shared._CP14.ZLevel;
+using Content.Shared.Ghost;
+using Robust.Shared.Map;
+
+namespace Content.Server._CP14.ZLevels.EntitySystems;
+
+public sealed partial class CP14StationZLevelsSystem
+{
+    private void InitActions()
+    {
+        SubscribeLocalEvent<GhostComponent, CP14ZLevelActionUp>(OnZLevelUp);
+        SubscribeLocalEvent<GhostComponent, CP14ZLevelActionDown>(OnZLevelDown);
+    }
+
+    private void OnZLevelDown(Entity<GhostComponent> ent, ref CP14ZLevelActionDown args)
+    {
+        ZLevelMove(ent, -1);
+    }
+
+    private void OnZLevelUp(Entity<GhostComponent> ent, ref CP14ZLevelActionUp args)
+    {
+        ZLevelMove(ent, 1);
+    }
+
+    private void ZLevelMove(EntityUid ent, int offset)
+    {
+        var xform = Transform(ent);
+        var map = xform.MapUid;
+
+        if (map is null)
+            return;
+
+        var targetMap = GetMapOffset(map.Value, offset);
+
+        if (targetMap is null)
+            return;
+
+        _transform.SetMapCoordinates(ent, new MapCoordinates(_transform.GetWorldPosition(ent), targetMap.Value));
+    }
+}