feat: remove formation/pricing page and all related content

Formation was a SaaS pricing page unrelated to the portfolio.
Removed: page, nav link, locale keys (nav.formation, seo.formation,
pricing.*) in both FR and EN, legacy source files.

i18n/locales/en.json

@@ -4,8 +4,7 @@
     "projects": "Projects",
     "about": "About",
     "contact": "Contact",
-    "fiverr": "Fiverr",
-    "formation": "Training"
+    "fiverr": "Fiverr"
   },
   "footer": {
     "copyright": "\u00a9 2026 Killian Dalcin",
@@ -52,10 +51,6 @@
     "fiverr": {
       "title": "Fiverr Services \u2014 Killian Dalcin",
       "description": "Development services available on Fiverr: Discord bots, Minecraft plugins, web applications."
-    },
-    "formation": {
-      "title": "Training \u2014 Killian Dalcin",
-      "description": "Training and courses offered by Killian Dalcin in web development."
     }
   },
   "home": {
@@ -433,77 +428,5 @@
         ]
       }
     }
-  },
-  "pricing": {
-    "title": "Choose your learning plan",
-    "subtitle": "Access comprehensive web development training with our flexible plans tailored for all levels",
-    "monthly": "Monthly",
-    "annual": "Annual",
-    "mostPopular": "Most Popular",
-    "startTrial": "Start Free Trial",
-    "trialInfo": "14-day free trial, then billing",
-    "plans": {
-      "starter": {
-        "name": "Starter",
-        "description": "Perfect to begin your web development journey"
-      },
-      "pro": {
-        "name": "Pro",
-        "description": "Ideal for developers who want to accelerate their learning"
-      },
-      "expert": {
-        "name": "Expert",
-        "description": "For those aiming for excellence and a professional career"
-      }
-    },
-    "features": {
-      "basicCourses": "Access to basic courses (HTML, CSS, JavaScript)",
-      "communityAccess": "Access to learning community",
-      "mobileApp": "Mobile app to learn anywhere",
-      "basicSupport": "Email support",
-      "certificates": "Completion certificates",
-      "allCourses": "Access to all courses and technologies",
-      "liveWorkshops": "Live workshops every week",
-      "mentorship": "Monthly mentorship sessions",
-      "prioritySupport": "24/7 priority support",
-      "jobBoard": "Access to exclusive job board",
-      "portfolioReview": "Portfolio review by experts",
-      "everythingPro": "Everything in Pro plan included",
-      "oneOnOneCoaching": "Weekly one-on-one coaching",
-      "customProjects": "Custom projects based on your goals",
-      "internshipPlacement": "Internship placement assistance",
-      "careerGuidance": "Personalized career guidance",
-      "exclusiveContent": "Exclusive and early-access content",
-      "networkingEvents": "Networking events with professionals"
-    },
-    "faq": {
-      "title": "Frequently Asked Questions",
-      "items": {
-        "trial": {
-          "question": "How does the free trial work?",
-          "answer": "Enjoy 14 days of full access to your chosen plan. No commitment, you can cancel anytime."
-        },
-        "cancel": {
-          "question": "Can I cancel my subscription anytime?",
-          "answer": "Yes, you can cancel your subscription anytime from your dashboard."
-        },
-        "refund": {
-          "question": "Do you offer a money-back guarantee?",
-          "answer": "We offer a 30-day money-back guarantee if you're not satisfied."
-        },
-        "upgrade": {
-          "question": "Can I change plans during my subscription?",
-          "answer": "Absolutely! You can upgrade to a higher plan anytime. The difference will be prorated."
-        },
-        "certificates": {
-          "question": "Are the certificates recognized?",
-          "answer": "Our certificates are recognized by many tech companies and can be added to your LinkedIn profile."
-        },
-        "support": {
-          "question": "What type of support is available?",
-          "answer": "Depending on your plan, you have access to email support, live chat, or personalized mentorship sessions."
-        }
-      }
-    }
   }
 }