feat(decals): tiles de decal de sòl compten com a pintats des del load

source/game/map/map.cpp

@@ -1,5 +1,6 @@
 #include "game/map/map.hpp"
 
+#include <cmath>
 #include <iostream>
 #include <stdexcept>
 
@@ -150,6 +151,13 @@ namespace Map {
         return true;
     }
 
+    auto pixelToTile(float px, float py) -> std::pair<int, int> {
+        const auto TS = static_cast<float>(tile_size);
+        const int COL = static_cast<int>(std::floor((px - static_cast<float>(tilemap_origin_x)) / TS));
+        const int ROW = static_cast<int>(std::floor((py - static_cast<float>(tilemap_origin_y)) / TS));
+        return {COL, ROW};
+    }
+
     auto makeInfo() -> Info {
         return {
             .playfield_x = playfield_x,