ajoute le portail Laravel : connexion prof/élève, session unique, gestion de classe, salle d'attente

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

portail/.gitignore

@@ -0,0 +1,28 @@
+*.log
+.DS_Store
+.env
+/database/database.sqlite
+.env.backup
+.env.production
+.phpactor.json
+.phpunit.result.cache
+/.codex
+/.cursor/
+/.idea
+/.nova
+/.phpunit.cache
+/.vscode
+/.zed
+/auth.json
+/node_modules
+/public/build
+/public/fonts-manifest.dev.json
+/public/hot
+/public/storage
+/storage/*.key
+/storage/pail
+/vendor
+_ide_helper.php
+Homestead.json
+Homestead.yaml
+Thumbs.db