Enhances UI with i18n, theme persistence and navigation

Adds internationalization (i18n) support using i18next, enabling multi-language support.

Persists theme selection in local storage, providing a consistent user experience across sessions.

Implements smooth scrolling navigation to different sections of the page.

Introduces a "Projects" section using a routing system, with tabs for professional and personal endeavors and detailed views using framer-motion for smooth transitions.

Includes updated resume PDFs.

src/i18n/fr/theme.json

@@ -0,0 +1,5 @@
+{
+  "light": "Clair",
+  "dark": "Sombre",
+  "system": "Système"
+}