gd: made wall jump more intuitive and act like a double jump

systems/head/HeadSystem.cs

@@ -29,4 +29,9 @@ public partial class HeadSystem : Node3D
 
         _camera.Rotation = currentCameraRotation;
     }
+
+    public Vector3 GetForwardHorizontalVector()
+    {
+        return GetGlobalTransform().Basis.Z;
+    }
 }