Placed map improvements

- Make placed maps walkable
- Add proper hitbox for placed maps
- Let placed maps propagate sunlight

items.lua

@@ -25,6 +25,14 @@ minetest.register_node("cartographer:map", {
     paramtype = "light",
     paramtype2 = "wallmounted",
     stack_max = 1,
+    sunlight_propagates = true,
+    walkable = false,
+    selection_box = {
+        type = "fixed",
+        fixed = {
+            {-0.5, -0.5, -0.5, 0.5, -7 / 16, 0.5},
+        },
+    },
     on_use = function(stack, player, _)
         local pos = player:get_pos();
         local name = player:get_player_name();