Create room 046 (Tower Stairway) and wire to room 045

- Added kq4_046_tower_stairway scene
- South exit to room 045 (Genesta's Bed Chamber) - bidirectional connection
- North exit to room 047 (Tower Chamber) - room 047 doesn't exist yet, transition pending
- Updated room 045 to add return transition to room 046

scenes/kq4_046_tower_stairway/kq4_046_tower_stairway.gd

@@ -0,0 +1,10 @@
+extends Scene
+
+
+func _on_tower_chamber_interacted() -> void:
+	# Room 047 doesn't exist yet - this will be wired when room 047 is created
+	push_warning("Room 047 (Tower Chamber) not yet created. Cannot transition.")
+
+
+func _on_genestas_bed_chamber_interacted() -> void:
+	$kq4_045_genestas_bed_chamber.default_script(self)