Create system_utils component

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

components/console_wrapper/CMakeLists.txt

@@ -1,5 +1,5 @@
 idf_component_register(
   SRCS "console.c"
   INCLUDE_DIRS "."
-  REQUIRES console esp_system
+  REQUIRES console system_utils
 )

components/console_wrapper/console.c

@@ -5,9 +5,10 @@
 
 #include "console.h"
 
+#include "system_utils.h"
+
 #include "esp_console.h"
 #include "esp_log.h"
-#include "esp_system.h"
 
 #define TAG "Console"
 
@@ -17,7 +18,7 @@ static int reboot_command_func(int argc, char **argv)
 {
 	(void)argc;
 	(void)argv;
-	(void)esp_restart();
+	reboot();
 	return 0;
 }