Create display module top level

main/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
   SRCS "main.c"
   INCLUDE_DIRS "."
-  REQUIRES config
+  REQUIRES config display
 )

main/main.c

@@ -4,8 +4,10 @@
  */
 
 #include "config.h"
+#include "display.h"
 
 void app_main(void)
 {
 	config_init();
+	display_init();
 }