Add SEO, sitemap, robots, search, Meilisearch and security files

- JSON-LD: Organization, WebSite with SearchAction, BreadcrumbList
- SitemapController: sitemapindex with main + paginated events (images/videos)
- RobotsController: dynamic robots.txt with sitemap URL
- SearchController: /search with Meilisearch (TODO)
- Meilisearch added to dev and prod docker-compose
- Breadcrumbs added to all controllers
- .well-known: security.txt, humans.txt, dnt-policy.txt
- PGP public key in public/key.asc
- SecurityController: /mot-de-passe + .well-known/change-password route

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

docker-compose-dev.yml

@@ -138,6 +138,17 @@ services:
       - ngrok
     entrypoint: sh /sync.sh
 
+  meilisearch:
+    image: getmeili/meilisearch:latest
+    container_name: e_ticket_meilisearch
+    environment:
+      MEILI_MASTER_KEY: e_ticket
+      MEILI_ENV: development
+    ports:
+      - "7700:7700"
+    volumes:
+      - meilisearch-data:/meili_data
+
   redisinsight:
     image: redis/redisinsight:latest
     container_name: e_ticket_redisinsight
@@ -153,3 +164,4 @@ volumes:
   bun-modules:
   vault-data:
   minio-data:
+  meilisearch-data: