CMakeList cleanup and import fix

examples/flappy_bird/lib/image_loader.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <paradiso/bitmap.hpp>
+
+#include <optional>
+#include <string>
+#include <unordered_map>
+
+class image_loader {
+  public:
+    /**
+     * @brief loads an Image from a file
+     * @param[in] filename path to file
+     * @return bitmap from file
+     */
+    static paradiso::Bitmap load(const std::string& filename);
+
+  private:
+    static inline const std::string ASSET_PATH = "assets/";
+
+    static std::unordered_map<std::string, paradiso::Bitmap> image_cache;
+
+    static paradiso::Bitmap readBMP(std::string& filename);
+};