✨ 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/migrations/2026_02_06_000001_create_testimonials_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('testimonials', function (Blueprint $table) {
+            $table->id();
+            $table->string('name');
+            $table->string('role');
+            $table->string('company')->nullable();
+            $table->string('avatar')->nullable();
+            $table->string('text_key');
+            $table->enum('personality', ['sage', 'sarcastique', 'enthousiaste', 'professionnel'])->default('professionnel');
+            $table->foreignId('project_id')->nullable()->constrained()->nullOnDelete();
+            $table->integer('display_order')->default(0);
+            $table->boolean('is_active')->default(true);
+            $table->timestamps();
+
+            $table->index('display_order');
+            $table->index('is_active');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('testimonials');
+    }
+};