feat(analytics): enhance Google Analytics with privacy compliance and comprehensive tracking

- Add automatic route change tracking for SPA navigation
- Implement Cookie consent banner for GDPR compliance
- Add performance tracking (LCP, FID, CLS Web Vitals)
- Add outbound link click tracking
- Integrate contact form submission tracking with conversion events
- Add CTA button click tracking in hero section
- Integrate error tracking in ErrorBoundary component
- Extend analytics utility library with 15+ tracking functions
- Configure IP anonymization and privacy settings
- Remove unused test files and deployment scripts
- Update case studies to include only specified cases
- Fix mobile navigation active state issues
- Fix lint errors in test files and components

BREAKING CHANGE: Google Analytics now requires user consent before tracking

src/components/layout/footer.tsx

@@ -16,7 +16,8 @@ export function Footer() {
                 width={48}
                 height={48}
                 className="h-12 w-auto transition-transform duration-200 hover:scale-105"
-                loading="lazy"
+                loading="eager"
+                priority
               />
             </div>
             <p className="text-[#5C5C5C] text-sm leading-relaxed mb-6">