Add ParsingStage_* enums.

right/src/usb_commands/usb_command_apply_config.h

@@ -1,6 +1,13 @@
 #ifndef __USB_COMMAND_APPLY_CONFIG_H__
 #define __USB_COMMAND_APPLY_CONFIG_H__
 
+// Typedefs:
+
+typedef enum {
+    ParsingStage_Validate,
+    ParsingStage_Apply,
+} parsing_stage_t;
+
 // Functions:
 
     void UsbCommand_ApplyConfig(void);