Hardware LED blinking (#1303)

* Hardware LED blinking notification messages
* Blink: fix crash on exit, reset blinking on exit
* Lib: remove unused UNUSED

Co-authored-by: あく <alleteam@gmail.com>

applications/notification/notification.h

@@ -1,6 +1,7 @@
 #pragma once
 #include "stdint.h"
 #include "stdbool.h"
+#include <furi_hal_resources.h>
 
 #ifdef __cplusplus
 extern "C" {
@@ -30,9 +31,16 @@ typedef struct {
     float display_brightness;
 } NotificationMessageDataForcedSettings;
 
+typedef struct {
+    uint16_t on_time;
+    uint16_t period;
+    Light color;
+} NotificationMessageDataLedBlink;
+
 typedef union {
     NotificationMessageDataSound sound;
     NotificationMessageDataLed led;
+    NotificationMessageDataLedBlink led_blink;
     NotificationMessageDataVibro vibro;
     NotificationMessageDataDelay delay;
     NotificationMessageDataForcedSettings forced_settings;
@@ -48,6 +56,10 @@ typedef enum {
     NotificationMessageTypeLedGreen,
     NotificationMessageTypeLedBlue,
 
+    NotificationMessageTypeLedBlinkStart,
+    NotificationMessageTypeLedBlinkStop,
+    NotificationMessageTypeLedBlinkColor,
+
     NotificationMessageTypeDelay,
 
     NotificationMessageTypeLedDisplayBacklight,