Implement a "Pause Emulation" option & hotkey (#2428)

* Add a "Pause Emulation" option and hotkey

Closes Ryujinx#1604

* Refactoring how pause is handled

* Applied suggested changes from review

* Applied suggested fixes

* Pass correct suspend type to threads for suspend/resume

* Fix NRE after stoping emulation

* Removing SimulateWakeUpMessage call after resuming emulation

* Skip suspending non game process

* Pause the tickCounter in the ExecutionContext

* Refactoring tickCounter pause/resume as suggested

* Fix Config migration to add pause hotkey

* Fixed pausing only application threads

* Fix exiting emulator while paused

* Avoid pause/resume while already paused/resumed

* Cleanup unused code

* Avoid restarting audio if stopping emulation while in pause.

* Added suggested changes

* Fix ConfigurationState

Ryujinx.Audio/Renderer/Server/AudioRendererManager.cs

@@ -214,6 +214,14 @@ namespace Ryujinx.Audio.Renderer.Server
             Logger.Info?.Print(LogClass.AudioRenderer, "Stopped audio renderer");
         }
 
+        /// <summary>
+        /// Stop sending commands to the <see cref="AudioProcessor"/> without stopping the worker thread.
+        /// </summary>
+        public void StopSendingCommands()
+        {
+            _isRunning = false;
+        }
+
         /// <summary>
         /// Worker main function. This is used to dispatch audio renderer commands to the <see cref="AudioProcessor"/>.
         /// </summary>