Add admin panel, Meilisearch buyer search, email redesign, and multiple features

Admin panel (/admin, ROLE_ROOT):
- Dashboard with CA HT Global/Commission cards and Meilisearch sync button
- Buyers page with search (Meilisearch), create form, pagination (KnpPaginator)
- Buyer actions: resend verification, force verify, reset password, delete
- Organizers page with tabs (pending/approved), approve/reject with emails
- Neo-brutalist design matching main site theme
- Vite admin entry point with dedicated SCSS
- CSP-compatible confirm dialogs via data-confirm attributes

Meilisearch integration:
- Auto-index buyers on email verification
- Remove from index on buyer deletion
- Manual sync button on dashboard
- Search bar on buyers page
- Add Meilisearch service to CI/SonarQube workflows
- Add MEILISEARCH env vars to .env.test
- Fix MeilisearchMessageHandler infinite loop: use request() directly instead
  of service methods that re-dispatch messages

Email templates:
- Redesign base email template to neo-brutalist style (borders, shadows, yellow footer)
- Add E-Cosplay logo, "E-Ticket solution proposee par e-cosplay.fr"
- Add admin_reset_password, organizer_approved, organizer_rejected templates

Other:
- Install knplabs/knp-paginator-bundle
- Add ^/admin access_control for ROLE_ROOT in security.yaml
- Update site footer with E-Ticket branding
- 18 admin tests, updated MeilisearchMessageHandler tests

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

tests/MessageHandler/MeilisearchMessageHandlerTest.php

@@ -21,8 +21,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     public function testHandleCreateIndex(): void
     {
         $this->meilisearch->expects(self::once())
-            ->method('createIndex')
-            ->with('events', 'uid');
+            ->method('request')
+            ->with('POST', '/indexes', ['uid' => 'events', 'primaryKey' => 'uid']);
 
         ($this->handler)(new MeilisearchMessage('createIndex', 'events', ['primaryKey' => 'uid']));
     }
@@ -30,8 +30,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     public function testHandleDeleteIndex(): void
     {
         $this->meilisearch->expects(self::once())
-            ->method('deleteIndex')
-            ->with('events');
+            ->method('request')
+            ->with('DELETE', '/indexes/events');
 
         ($this->handler)(new MeilisearchMessage('deleteIndex', 'events'));
     }
@@ -40,8 +40,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     {
         $docs = [['id' => 1]];
         $this->meilisearch->expects(self::once())
-            ->method('addDocuments')
-            ->with('events', $docs);
+            ->method('request')
+            ->with('POST', '/indexes/events/documents', $docs);
 
         ($this->handler)(new MeilisearchMessage('addDocuments', 'events', ['documents' => $docs]));
     }
@@ -50,8 +50,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     {
         $docs = [['id' => 1, 'title' => 'Updated']];
         $this->meilisearch->expects(self::once())
-            ->method('updateDocuments')
-            ->with('events', $docs);
+            ->method('request')
+            ->with('PUT', '/indexes/events/documents', $docs);
 
         ($this->handler)(new MeilisearchMessage('updateDocuments', 'events', ['documents' => $docs]));
     }
@@ -59,8 +59,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     public function testHandleDeleteDocument(): void
     {
         $this->meilisearch->expects(self::once())
-            ->method('deleteDocument')
-            ->with('events', 42);
+            ->method('request')
+            ->with('DELETE', '/indexes/events/documents/42');
 
         ($this->handler)(new MeilisearchMessage('deleteDocument', 'events', ['documentId' => 42]));
     }
@@ -68,8 +68,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     public function testHandleDeleteDocuments(): void
     {
         $this->meilisearch->expects(self::once())
-            ->method('deleteDocuments')
-            ->with('events', [1, 2, 3]);
+            ->method('request')
+            ->with('POST', '/indexes/events/documents/delete-batch', [1, 2, 3]);
 
         ($this->handler)(new MeilisearchMessage('deleteDocuments', 'events', ['ids' => [1, 2, 3]]));
     }
@@ -78,8 +78,8 @@ class MeilisearchMessageHandlerTest extends TestCase
     {
         $settings = ['searchableAttributes' => ['title']];
         $this->meilisearch->expects(self::once())
-            ->method('updateSettings')
-            ->with('events', $settings);
+            ->method('request')
+            ->with('PATCH', '/indexes/events/settings', $settings);
 
         ($this->handler)(new MeilisearchMessage('updateSettings', 'events', ['settings' => $settings]));
     }