N°8771 - Add Symfony form component to iTop core (#760)

- Add Symfony Form Component
- Add Symfony CSRF security component
- Add iTop default form template
- Add Twig debug extension to Twig Environment
- Add iTop abstract controller facility to get form builder
- Add Twig filter to make trans an alias of dict_s filter

lib/symfony/security-core/README.md

@@ -0,0 +1,63 @@
+Security Component - Core
+=========================
+
+Security provides an infrastructure for sophisticated authorization systems,
+which makes it possible to easily separate the actual authorization logic from
+so called user providers that hold the users credentials.
+
+Getting Started
+---------------
+
+```
+$ composer require symfony/security-core
+```
+
+```php
+use Symfony\Component\Security\Core\Authentication\AuthenticationTrustResolver;
+use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
+use Symfony\Component\Security\Core\Authorization\AccessDecisionManager;
+use Symfony\Component\Security\Core\Authorization\Voter\AuthenticatedVoter;
+use Symfony\Component\Security\Core\Authorization\Voter\RoleVoter;
+use Symfony\Component\Security\Core\Authorization\Voter\RoleHierarchyVoter;
+use Symfony\Component\Security\Core\Exception\AccessDeniedException;
+use Symfony\Component\Security\Core\Role\RoleHierarchy;
+
+$accessDecisionManager = new AccessDecisionManager([
+    new AuthenticatedVoter(new AuthenticationTrustResolver()),
+    new RoleVoter(),
+    new RoleHierarchyVoter(new RoleHierarchy([
+        'ROLE_ADMIN' => ['ROLE_USER'],
+    ]))
+]);
+
+$user = new \App\Entity\User(...);
+$token = new UsernamePasswordToken($user, 'main', $user->getRoles());
+
+if (!$accessDecisionManager->decide($token, ['ROLE_ADMIN'])) {
+    throw new AccessDeniedException();
+}
+```
+
+Sponsor
+-------
+
+The Security component for Symfony 6.4 is [backed][1] by [SymfonyCasts][2].
+
+Learn Symfony faster by watching real projects being built and actively coding
+along with them. SymfonyCasts bridges that learning gap, bringing you video
+tutorials and coding challenges. Code on!
+
+Help Symfony by [sponsoring][3] its development!
+
+Resources
+---------
+
+ * [Documentation](https://symfony.com/doc/current/components/security.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)
+
+[1]: https://symfony.com/backers
+[2]: https://symfonycasts.com
+[3]: https://symfony.com/sponsor