feat(auth): enhance user registration with names and improve UI

- Add first_name and last_name fields to User model with validations
- Configure Devise registrations controller to accept name parameters
- Update registration form with name fields and improved styling
- Replace Twitter Bootstrap pagination with custom Tailwind components
- Add French locale translations for pagination and models
- Update header styling with responsive design improvements
- Add EditorConfig for consistent code formatting
- Fix logout controller URL handling and improve JavaScript
- Update seed data and test fixtures with name attributes
- Add comprehensive model tests for name validations
- Add test.sh script for easier test execution

💘 Generated with Crush
Co-Authored-By: Crush <crush@charm.land>

db/schema.rb

@@ -69,6 +69,8 @@ ActiveRecord::Schema[8.0].define(version: 2025_08_23_171354) do
     t.string "reset_password_token"
     t.datetime "reset_password_sent_at"
     t.datetime "remember_created_at"
+    t.string "last_name"
+    t.string "first_name"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.index ["email"], name: "index_users_on_email", unique: true