bootoptions: use NVRAM instead of wearing out flash for crash detection in esp32

src/BootOptions.h

@@ -1,4 +1,5 @@
 #pragma once
+#include <Arduino.h>
 
 struct BootOptions {
     static void initPins();
@@ -12,4 +13,6 @@ struct BootOptions {
     bool isFlash = false;
     bool lastBootWasFlash = false;
     bool isSafeMode = false;
+    uint8_t crashCount = 0;
+    uint8_t resetReason = 0;
 };