refactor: header file for every module

include/clouds.h

@@ -0,0 +1,18 @@
+#ifndef CLOUDS_H
+#define CLOUDS_H
+
+#include <raylib.h>
+
+typedef struct {
+  Shader shader;
+  float time;
+  float coverage;
+} Clouds;
+
+Clouds CreateClouds(void);
+void UpdateClouds(Clouds *clouds, float deltaTime);
+void RenderCloudShadows(Clouds *clouds, Camera2D *camera);
+void RenderClouds(Clouds *clouds, Camera2D *camera);
+void UnloadClouds(Clouds *clouds);
+
+#endif