Stand: SMTP-Test, Admin-Mail-Tab, Notifiable-Fix, Lazy-Quill

- Fix: Notifiable-Trait zum User-Model hinzugefuegt (behebt notify()-500er)
- Installer: SMTP-Verbindungstest mit EsmtpTransport + Ueberspringen-Link
- Admin: Neuer E-Mail-Tab mit SMTP-Konfiguration + Verbindungstest
- Admin: Lazy Quill-Initialisierung (nur sichtbare Locale wird geladen)
- Uebersetzungen: 17 neue Mail-Keys in allen 6 Sprachen

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

vendor/symfony/console/README.md

@@ -0,0 +1,27 @@
+Console Component
+=================
+
+The Console component eases the creation of beautiful and testable command line
+interfaces.
+
+Sponsor
+-------
+
+Help Symfony by [sponsoring][1] its development!
+
+Resources
+---------
+
+ * [Documentation](https://symfony.com/doc/current/components/console.html)
+ * [Contributing](https://symfony.com/doc/current/contributing/index.html)
+ * [Report issues](https://github.com/symfony/symfony/issues) and
+   [send Pull Requests](https://github.com/symfony/symfony/pulls)
+   in the [main Symfony repository](https://github.com/symfony/symfony)
+
+Credits
+-------
+
+`Resources/bin/hiddeninput.exe` is a third party binary provided within this
+component. Find sources and license at https://github.com/Seldaek/hidden-input.
+
+[1]: https://symfony.com/sponsor