chore: Renumber the search script to resolve the 07- prefix collision

Upstream's breadcrumb-truncation script arrived as 07-breadcrumbs.js; our
search script already used the 07- prefix. The bundle concatenates the
numbered scripts in sorted order and the two are independent, so this only
restores the one-number-one-script convention.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: lfrancke

ui/src/js/07-search.js ui/src/js/08-search.jsui/src/js/07-search.js renamed to ui/src/js/08-search.js

@@ -2,7 +2,7 @@
 <script async src="{{{uiRootPath}}}/js/vendor/highlight.js"></script>
 <script async src="{{{uiRootPath}}}/js/vendor/tabs.js" data-sync-storage-key="preferred-tab"></script>
 <script>
-    // Loads the pagefind search UI on first use (see 07-search.js); the
+    // Loads the pagefind search UI on first use (see 08-search.js); the
     // assets stay off the critical rendering path of every page.
     // Some styling is customized, these classes are found in search.css.
     window.loadSearch = (function () {