Add a "construction" banner to the base layout

src/routes/+layout.svelte

@@ -3,6 +3,8 @@
   import Navigation from "$lib/components/Navigation.svelte";
   import { onMount } from "svelte";
   import { page } from "$app/stores";
+  import { Alert } from "flowbite-svelte";
+  import { HammerSolid } from "flowbite-svelte-icons";
 
   // Compute viewport height.
   $: displayHeight = window.innerHeight;
@@ -42,5 +44,11 @@
 
 <div class={'leather min-h-full w-full flex flex-col items-center'}>
   <Navigation class='sticky top-0' />
+  <Alert rounded={false} class='border-t-4 border-primary-500 text-gray-900 dark:text-gray-100 dark:border-primary-500 flex justify-left'>
+    <HammerSolid class='mr-2 h-5 w-5 text-primary-500 dark:text-primary-500' />
+    <span class='font-medium'>
+      Pardon our dust!  The publication view is currently using an experimental loader, and may be unstable.
+    </span>
+  </Alert>
   <slot />
 </div>