refactor(frontend): migrate from Vite to Nuxt SPA

Replace Vite and Vue Router with Nuxt framework
Update Docker, build scripts, and env vars for Nuxt generate

frontend/pages/habitats/new.vue

@@ -0,0 +1,14 @@
+<script setup lang="ts">
+import HabitatList from '../../src/views/HabitatList.vue';
+
+definePageMeta({
+  name: 'habitat-new',
+  requiredPermission: 'habitats.create',
+  editorModal: true,
+  seo: { titleKey: 'pages.habitats.newTitle', descriptionKey: 'pages.habitats.editSubtitle', canonicalPath: '/habitats', noindex: true }
+});
+</script>
+
+<template>
+  <HabitatList :event-only="false" />
+</template>