Adding watch splash screen source files - in dev

src/lvgl_win_sim/lv_port_win_codeblocks/splash_screen.h

@@ -0,0 +1,13 @@
+#ifndef SPLASH_SCREEN_H
+#define SPLASH_SCREEN_H
+
+#include "lvgl.h"
+
+typedef struct SplashScreen
+{
+    //Can be erased attributes
+    lv_obj_t display;
+    //Should not be erased attributes
+} SplashScreen_t;
+
+#endif //SPLASH_SCREEN_H