feat: add Bars3Icon import to WebsiteNavbar for mobile menu toggle

Author: denisdobra10

docs-v3/.data/content/contents.sqlite

@@ -156,6 +156,8 @@
 </template>
 
 <script setup lang="ts">
+import { Bars3Icon } from '@heroicons/vue/24/outline'
+
 // Mobile menu state
 const isMobileMenuOpen = ref(false)