nav: keep Guides only in the Resources menu, drop from top bar

Address Kristopher's review: the Application Guide link shouldn't live in
two places. Remove "Guides" from the top utility bar (AppUtilityBar.vue and
its 11ty mirror) and keep it in the Resources mega-menu's Reference column.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CVTs4TWBz2sVJ3k55ZHUg8

Author: dgatti0213

nuxt/components/AppUtilityBar.vue

@@ -46,7 +46,6 @@ onMounted(() => {
       <nav class="hidden md:flex items-center gap-5 shrink-0" aria-label="Quick links">
         <a href="/about/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">About us</a>
         <a href="/blog/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Blog</a>
-        <a href="/application-guide/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Guides</a>
         <a href="/docs/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Docs</a>
         <a href="/support/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Support</a>
         <a href="/docs/device-agent/install/overview/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Install on edge</a>

src/_includes/components/top-utility-bar.njk

@@ -28,7 +28,6 @@
         <nav class="hidden md:flex items-center gap-5 shrink-0" aria-label="Quick links">
             <a href="/about/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">About us</a>
             <a href="/blog/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Blog</a>
-            <a href="/application-guide/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Guides</a>
             <a href="/docs/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Docs</a>
             <a href="/support/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Support</a>
             <a href="/platform/device-agent/" class="text-indigo-100 hover:text-white no-underline hover:no-underline">Install on edge</a>