integrate support for libvirt events

[lukas016]

Summary

Libvirt service supports register event handler, so we can listen to events from libvirt directly in libvirt-provider and we don't need active pulling of information from libvirt.

          I would suggest to subscribe to the `LifeCycleEvents` of the libvirt Domain and enqueue Machines if something changes in the domain.

Here is some sample code how this might look like:

// Subscribe to lifecycle events using the provided context
eventChan, err := l.LifecycleEvents(ctx)
if err != nil {
	fmt.Println("Failed to subscribe to lifecycle events:", err)
	return
}

fmt.Println("Subscribed to lifecycle events. Listening for events...")

// Listen for lifecycle events in a separate goroutine
go func() {
	for event := range eventChan {
		fmt.Printf("Received lifecycle event: %+v\n", event)
                // enqueue Machines here and switch over the events
	}
	fmt.Println("Lifecycle event channel closed.")
}()

// Wait for context to be cancelled (e.g., by receiving a signal)
<-ctx.Done()
fmt.Println("Context cancelled. Shutting down...")

This can be also used to consolidate other go routines which we are starting during the initialization of the provider.

Originally posted by @afritzler in #144 (review)