Make auto-detection of the current module path to simplify arguments for some functions

I've added new helper functions, that try to autodetect module names and paths:

• getModuleName() - Gets a module name from a namespace of a module class.
• getModuleRoot() - Gets a root module folder from a module file full path.

And a new function initService that initializes a service only by the class name, or a service name.

And I had to make a breaking change in the function callEventSubscriber() to accept only the service name as the first parameter, so the list of parameters is changed from this:
function callEventSubscriber(string $servicesYamlFile, string $serviceName, string $eventName, &$event): void;
to this:
function callEventSubscriber($service, string $eventName, object &$event): void;

To have the previous behavior, now you need to pass the service YAML file and the service name in the first parameter as an array.