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/migrate/20250816145933_devise_create_users.rb

@@ -32,6 +32,9 @@ class DeviseCreateUsers < ActiveRecord::Migration[8.0]
       # t.string   :unlock_token # Only if unlock strategy is :email or :both
       # t.datetime :locked_at
 
+      # Personnal informations
+      t.string :last_name,  null: true # Nom
+      t.string :first_name, null: true # Prénom
 
       t.timestamps null: false
     end