feat(ui): implement dynamic dropdown navigation and refactor project cards

Replaced the static navigation with a dynamic, internationalized dropdown menu powered by a new `useNavLinks` composable. The
navigation items are now sourced from i18n files. The featured project cards on the homepage have been refactored to use the
`<UPageCard>` component, and the content schema is updated with `spotlight` and `highlight` options for enhanced display.

app/utils/navLinks.ts

@@ -1,12 +0,0 @@
-import type {NavigationMenuItem} from "@nuxt/ui";
-
-export const navLinks: NavigationMenuItem[] = [{
-  label: "Services",
-  icon: "mdi:briefcase-outline"
-}, {
-  label: "Projects",
-  icon: "mdi:lightbulb-group-outline"
-}, {
-  label: "Insights",
-  icon: "mdi:brain"
-}]