✨ 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/app/Http/Controllers/Api/TestimonialController.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Http\Controllers\Api;
+
+use App\Http\Controllers\Controller;
+use App\Http\Resources\TestimonialResource;
+use App\Models\Testimonial;
+
+class TestimonialController extends Controller
+{
+    public function index()
+    {
+        $testimonials = Testimonial::with('project')
+            ->active()
+            ->ordered()
+            ->get();
+
+        return TestimonialResource::collection($testimonials)
+            ->additional(['meta' => ['lang' => app()->getLocale()]]);
+    }
+}