✨ Add testimonials page with personality-styled cards (Story 2.6)

- Add testimonials table migration with personality enum
- Create Testimonial model with HasTranslations trait
- Add TestimonialSeeder with 4 test testimonials
- Create TestimonialController and TestimonialResource
- Add useFetchTestimonials composable
- Create TestimonialCard component with personality-based styling
- Add temoignages.vue page with loading/error states
- Add testimonials translations in FR/EN

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

api/database/seeders/DatabaseSeeder.php

@@ -16,6 +16,7 @@ class DatabaseSeeder extends Seeder
             SkillSeeder::class,
             ProjectSeeder::class,
             SkillProjectSeeder::class,
+            TestimonialSeeder::class,
         ]);
     }
 }