feat(admin): add initial admin dashboard structure

This commit introduces the foundational structure for the new admin dashboard.

- Utilizes @nuxt/ui to build the dashboard layout, including a collapsible sidebar and navigation.
- Adds initial pages for the dashboard, news, events, and hall of fame management.
- Implements a composable `useDashboardSidebarLinks` for managing sidebar navigation.
- Refactors the default layout by integrating the header and footer directly.
- Swaps the primary and secondary theme colors across the application.

app/layouts/admin-login.vue

@@ -0,0 +1,13 @@
+<template>
+  <div>
+    <slot />
+  </div>
+</template>
+
+<script lang="ts" setup>
+
+</script>
+
+<style>
+
+</style>