scenes/levels: add new map handling function and wrapper

imperium-porcorum.love/scenes/levels/controller/world.lua

@@ -110,6 +110,22 @@ function Level:getEntities()
   return self.entities:getItems()
 end
 
+-- MAP FUNCTIONS
+-- All map wrappers
+
+function Level:getDimensions()
+  return  self.map.width  * self.map.tilewidth,
+          self.map.height * self.map.tileheight
+end
+
+function Level:setBackgroundColor(r, g, b)
+  self.backcolor = {r, g, b}
+end
+
+function Level:getBackgroundColor()
+  return self.backcolor[1]/256, self.backcolor[2]/256, self.backcolor[3]/256
+end
+
 -- UPDATE FUNCTIONS
 -- All update functions