…iles with trans() in translation commands (yceruto)This PR was merged into the 4.3-dev branch.Discussion----------[FrameworkBundle][Translation] Added support for PHP files with trans() in translation commands| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets |#29085| License       | MIT| Doc PR        | -This PR allows translation commands be able to debug and update translation messages from any PHP file/class defined as service, injecting or wiring the `translator` service, e.g.:```phpuse Symfony\Component\Translation\TranslatorInterface;class ParallelUniverseController extends AbstractController{    public function hello(Request $request, TranslatorInterface $translator)    {        // this id 'hello_message' will be extracted from translation:update        $message = $translator->trans('hello_message');        // send message to space...    }}```this supports all ways of wiring (auto or not): via constructor, public property, method calls, service subscriber and controller argument.Commits-------9f9b828 Added support for PHP files with translation in translation commands

…P files (javiereguiluz)This PR was squashed before being merged into the 4.3 branch (closes#11598).Discussion----------Mentioned the extraction of translation contents from PHP filesSeesymfony/symfony#30120 andhttps://symfony.com/blog/new-in-symfony-4-3-extracting-translation-contents-from-php-files.Commits-------f82ad62 Mentioned the extraction of translation contents from PHP files