✨ 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/Resources/TestimonialResource.php

@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Resources;
+
+use Illuminate\Http\Request;
+use Illuminate\Http\Resources\Json\JsonResource;
+
+class TestimonialResource extends JsonResource
+{
+    public function toArray(Request $request): array
+    {
+        return [
+            'id' => $this->id,
+            'name' => $this->name,
+            'role' => $this->role,
+            'company' => $this->company,
+            'avatar' => $this->avatar,
+            'text' => $this->getTranslated('text_key'),
+            'personality' => $this->personality,
+            'display_order' => $this->display_order,
+            'project' => $this->whenLoaded('project', function () {
+                return $this->project ? [
+                    'id' => $this->project->id,
+                    'slug' => $this->project->slug,
+                    'title' => $this->project->getTranslated('title_key'),
+                ] : null;
+            }),
+        ];
+    }
+}