NamingStrategy as Service

[glassp]

Unrelated (and invisible) to this PR:

I'd much rather prefer having a service that acts as a registry, which generates the naming strategies for various domain languages, so that it could be easily extended.

E.g. this code:

        $actionName = new UnicodeString($input->getOption("command-action"));
        $actionName = $actionName->camel()->title()->toString();

        if ("en" === $this->getDomainLanguage($domain)) {
            $commandNamespace = $actionName . $entity;
        }
        else {
            $commandNamespace = $entity . $actionName;
        }

would become this:

        $actionName = new UnicodeString($input->getOption("command-action"));
        
        $namingStrategy = $this->domainNamingStrategyRegistry->getForDomain($domain);
        $commandNamespace = $namingStategy->generateCommandNamespace(new DomaindNamingStategyInput($domain, $actionName, $entity));

Originally posted by @keichinger in #6 (comment)