feat(Core/Time): Implement saparated manager for game time (#8630)

src/server/game/Time/GameTime.h

@@ -0,0 +1,48 @@
+/*
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GAMETIME_H
+#define __GAMETIME_H
+
+#include "Define.h"
+#include "Duration.h"
+
+namespace GameTime
+{
+    // Server start time
+    AC_GAME_API Seconds GetStartTime();
+
+    // Current server time (unix)
+    AC_GAME_API Seconds GetGameTime();
+
+    // Milliseconds since server start
+    AC_GAME_API Milliseconds GetGameTimeMS();
+
+    /// Current chrono system_clock time point
+    AC_GAME_API SystemTimePoint GetSystemTime();
+
+    /// Current chrono steady_clock time point
+    AC_GAME_API TimePoint Now();
+
+    /// Uptime
+    AC_GAME_API Seconds GetUptime();
+
+    /// Update all timers
+    void UpdateGameTimers();
+}
+
+#endif