feat: animations, responsive design

Animations
- added opacity animation for experience page
- added stagger animation for navbar items on mobile
- added animation for landing page for years and language indications

Pages
- About Page mockup

Redesign
- Navbar to include icons on desktop

ts/src/experiences.ts

@@ -0,0 +1,16 @@
+const { animate, inView } = Motion;
+
+inView(
+  "section div",
+  (element) => {
+    animate(
+      element,
+      { opacity: 1 },
+      {
+        duration: 0.7,
+      },
+    );
+    return () => animate(element, { opacity: 0 }, { duration: 0.7 });
+  },
+  { some: 0.7, initial: false },
+);