✨ Add projects gallery page with responsive grid (Story 2.2)

- Create useFetchProjects composable for API integration
- Implement responsive grid layout (1/2/3/4 columns)
- Add stagger fadeInUp animation with prefers-reduced-motion support
- Include loading skeleton, error state with retry, and empty state
- Configure SEO meta tags via useSeo composable
- Update Project model ordered scope for proper sorting

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

frontend/i18n/en.json

@@ -16,7 +16,8 @@
     "loading": "Loading...",
     "language": "Language",
     "back_home": "Back to home",
-    "back_to_adventure": "Back to the adventure"
+    "back_to_adventure": "Back to the adventure",
+    "retry": "Retry"
   },
   "landing": {
     "title": "Welcome to my universe",
@@ -75,8 +76,12 @@
     "meta_description": "Full-Stack Developer specialized in Vue.js, Nuxt, Laravel. Discover my profile and projects in 30 seconds."
   },
   "projects": {
+    "title": "My Projects",
+    "page_title": "Projects | Skycel",
+    "page_description": "Discover projects created by C\u00e9lian, full-stack web developer.",
     "discover": "Discover",
     "no_projects": "No projects yet",
+    "load_error": "Unable to load projects...",
     "view_all": "View all projects"
   },
   "pages": {