fix(ecs): Check if the component is not alive before destroying it

[MrDave1999]

Problem Context

When a player is kicked from the game upon clicking the accept button in the dialog, an exception is generated:

[SampSharp:ERROR] Unhandled exception: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> SampSharp.Entities.EntityNotFoundException: The specified entity could not be found. (Parameter 'component')
   at SampSharp.Entities.EntityManager.Destroy(Component component)
   at SampSharp.Entities.Component.Destroy()
   at SampSharp.Entities.SAMP.DialogSystem.OnDialogResponse(VisibleDialog player, Int32 dialogId, Int32 response, Int32 listItem, String inputText)
   at lambda_method4(Closure, Object, Object[], IServiceProvider, IEntityManager)
   at SampSharp.Entities.EventService.<>c__DisplayClass11_0.<CreateInvoker>b__0(Object instance, EventContext eventContext)
   at SampSharp.Entities.EventService.Invoke(EventContext context)
   at SampSharp.Entities.SAMP.EntityMiddleware.Invoke(EventContext context, IEntityManager entityManager)
   at lambda_method97(Closure, Object, EventContext, IServiceProvider)
   at SampSharp.Entities.EventService.<>c__DisplayClass12_0.<BuildInvoke>b__0(Object[] args)
   at InvokeStub_<>c__DisplayClass12_0.<BuildInvoke>b__0(Object, Span`1)
   at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   --- End of inner exception stack trace ---
   at System.Reflection.MethodBaseInvoker.InvokeWithOneArg(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at SampSharp.Core.Callbacks.Callback.Invoke(Byte[] buffer, Int32 startIndex)
   at SampSharp.Core.HostedGameModeClient.PublicCall(String name, IntPtr data, Int32 length)

A specific example can be found here.