Introduce Event Services (#1653)

* Allow to enable/disable suspend & lock event handling

* Fix Windows

* Refactor event handling incl.CEC

* Revert "Auxiliary commit to revert individual files from 0d9a8b8a3a4a09609a339f54c7d8a9384c561282"

This reverts commit 80737d926ad151a07b2493dd1685ed502975cb2e.

* Support Events for Grabbers generically

* Have CECEvent to actions configurable, further clean-ups

* Remove handleEvent from V4L2grabber, as grabber will be stopped on suspend

* Validate that one CEC Event can only trigger one action

* MacOS lock/unlock added

* fast windows fix

* Corrections

* Fix CodeQL findings

* add macos lock/unlock handler

* Migration of CEC-config and have default actions

* Correct target_link_libraries

* Include Foundation

* macOS include AppKit

* Support Scheduled Events, cleanups.

* Fix destructing

* Fix coredump during free

* Consider additional error sceanrio

* Fix missing code

* install desktop icons

* correct bash logic

---------

Co-authored-by: Paulchen-Panther <16664240+Paulchen-Panther@users.noreply.github.com>

include/events/EventHandler.h

@@ -0,0 +1,49 @@
+#ifndef EVENTHANDLER_H
+#define EVENTHANDLER_H
+
+#include <utils/settings.h>
+#include <events/EventEnum.h>
+
+#include <QObject>
+
+class Logger;
+
+class EventHandler : public QObject
+{
+	Q_OBJECT
+
+public:
+	EventHandler();
+	~EventHandler() override;
+
+	static EventHandler* getInstance();
+
+public slots:
+
+	void suspend(bool sleep);
+
+	void suspend();
+	void resume();
+	void toggleSuspend();
+
+	void idle(bool isIdle);
+	void idle();
+	void resumeIdle();
+	void toggleIdle();
+
+	void handleEvent(Event event);
+
+signals:
+	void signalEvent(Event event);
+
+protected:
+	Logger * _log {};
+
+private:
+	bool _isSuspended;
+	bool _isIdle;
+};
+
+
+#endif // EVENTHANDLER_H
+