Restructure files

game/systems_ui.c

@@ -0,0 +1,15 @@
+#include "systems.h"
+
+#include "game_state.h"
+
+void uiTask(ecs_iter_t *it) {
+    const Game *game = ecs_singleton_get(ECS, Game);
+    Vector2 mousePos = GetMousePosition();
+    Vector2 worldPos = GetScreenToWorld2D(mousePos, game->camera);
+
+    const BzTileMap *map = &game->map;
+
+    i32 tileX = (i32) worldPos.x / map->tileWidth;
+    i32 tileY = (i32) worldPos.y / map->tileHeight;
+
+}