Created basic alarm app

src/components/alarm/AlarmController.h

@@ -0,0 +1,50 @@
+#pragma once
+
+#include <cstdint>
+#include "app_timer.h"
+#include "components/datetime/DateTimeController.h"
+
+namespace Pinetime {
+  namespace System {
+    class SystemTask;
+  }
+  namespace Controllers {
+    class AlarmController {
+    public:
+      AlarmController(Controllers::DateTime& dateTimeController);
+
+      void Init();
+      void SetAlarm(uint8_t alarmHr, uint8_t alarmMin);
+      void DisableAlarm();
+      void SetOffAlarmNow();
+      uint32_t SecondsToAlarm();
+      void StopAlerting();
+      void Register(System::SystemTask* systemTask);
+      enum class AlarmState { Not_Set, Set, Alerting };
+      enum class RecurType { None, Daily, Weekdays };
+      void ToggleRecurrence();
+      uint8_t Hours() const {
+        return hours;
+      }
+      uint8_t Minutes() const {
+        return minutes;
+      }
+      AlarmState State() const {
+        return state;
+      }
+      RecurType Recurrence() const {
+        return recurrence;
+      }
+
+    private:
+      Controllers::DateTime& dateTimeController;
+      System::SystemTask* systemTask = nullptr;
+      uint8_t hours;
+      uint8_t minutes;
+      std::chrono::time_point<std::chrono::system_clock, std::chrono::nanoseconds> alarmTime;
+      AlarmState state = AlarmState::Not_Set; 
+      RecurType recurrence = RecurType::None;
+      void scheduleAlarm();
+    };
+  }
+}