Create system_utils component

Somewhat of a 'misc' component; handles early initialization, checking
for first boot and rebooting.

main/CMakeLists.txt

@@ -1,5 +1,6 @@
 idf_component_register(
   SRCS "main.c"
   INCLUDE_DIRS "."
-  REQUIRES buttons console_wrapper display settings sound time wifi
+  REQUIRES
+    buttons console_wrapper display settings sound system_utils time wifi
 )

main/main.c

@@ -9,11 +9,14 @@
 #include "display.h"
 #include "settings.h"
 #include "sound.h"
+#include "system_utils.h"
 #include "time_manager.h"
 #include "wifi.h"
 
 void app_main(void)
 {
+	early_init();
+
 	console_init();
 	settings_init();
 	wifi_init();