add kingdom entrance warning entity

nodes.lua

@@ -447,6 +447,15 @@ minetest.register_entity("illuna:travelcenter_sw", {
     textures = {"illuna_travelcenter_sw.png"},
 })
 
+minetest.register_entity("illuna:kingdom_entrance", {
+    visual = "sprite",
+    visual_size = {x=2.5,y=2.5},
+    collisionbox = {0},
+    physical = false,
+    glow = 10,
+    textures = {"illuna_kingdom_entrance.png"},
+})
+
 function illuna.node_sound_wool(table)
     table = table or {}
     table.footstep = table.footstep or