Added HandleLeaderboardTriggeredEvent to AchievementManager

HandleLeaderboardTriggeredEvent processes a leaderboard event and asynchronizes via the work queue a synchronous call to SubmitLeaderboard.

Source/Core/Core/AchievementManager.cpp

@@ -429,6 +429,12 @@ void AchievementManager::HandleAchievementTriggeredEvent(const rc_runtime_event_
                                 Config::Get(Config::RA_ENCORE_ENABLED));
 }
 
+void AchievementManager::HandleLeaderboardTriggeredEvent(const rc_runtime_event_t* runtime_event)
+{
+  m_queue.EmplaceItem(
+      [this, runtime_event] { SubmitLeaderboard(runtime_event->id, runtime_event->value); });
+}
+
 // Every RetroAchievements API call, with only a partial exception for fetch_image, follows
 // the same design pattern (here, X is the name of the call):
 //   Create a specific rc_api_X_request_t struct and populate with the necessary values

Source/Core/Core/AchievementManager.h

@@ -70,6 +70,7 @@ private:
   ResponseType PingRichPresence(const RichPresence& rich_presence);
 
   void HandleAchievementTriggeredEvent(const rc_runtime_event_t* runtime_event);
+  void HandleLeaderboardTriggeredEvent(const rc_runtime_event_t* runtime_event);
 
   template <typename RcRequest, typename RcResponse>
   ResponseType Request(RcRequest rc_request, RcResponse* rc_response,