Add entity map

game/game_state.h

@@ -4,13 +4,15 @@
 #include <breeze.h>
 #include <flecs.h>
 
+#include "entity_map.h"
+
 typedef struct Game {
     Camera2D camera;
     BzTileset terrainTileset;
     BzTileset buildingsTileset;
     BzTileset entitiesTileset;
     BzTileMap map;
-    ecs_entity_t *entityMap;
+    EntityMap entityMap;
     f32 frameDuration;
     Vector2 targetPos;
     ecs_entity_t entity;