cleanup and improvements

improved driver creation
fixed compile warnings in check.h
hello_world example is now working again with lvgl

components/nanobake/inc/nb_hardware.h

@@ -1,7 +1,7 @@
 #pragma once
 
-#include "nb_config.h"
-#include <lvgl.h>
+#include "nb_display.h"
+#include "nb_touch.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -13,12 +13,6 @@ struct nb_hardware {
     nb_touch_t* _Nullable touch;
 };
 
-/**
- * @param[in] config
- * @return a newly allocated platform instance (caller takes ownership)
- */
-nb_hardware_t _Nonnull* nb_hardware_alloc(nb_config_t _Nonnull* config);
-
 #ifdef __cplusplus
 }
 #endif