refactor: restructure project to classic MVC pattern

src/composables/useNavigation.ts

@@ -0,0 +1,18 @@
+export function useNavigation() {
+    function scrollToSection(sectionId: string) {
+    const element = document.getElementById(sectionId)
+    if (element) {
+      const offset = 80 // Account for fixed header
+      const elementPosition = element.offsetTop - offset
+
+      window.scrollTo({
+        top: elementPosition,
+        behavior: "smooth",
+      })
+    }
+  }
+
+  return {
+    scrollToSection,
+  }
+}