Add a search to the showcase

A search app bar looks through every section, example and component,
opens the section, or the example at its anchor on its page, and is
reached from anywhere with / or Ctrl+K. Section pages now carry their
own heading.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

resources/views/showcase/sections/timepickers.blade.php

@@ -1,6 +1,6 @@
 @php
     $examples = [
-        'Time pickers: 12 and 24 hours, outlined and filled' => <<<'BLADE'
+        '12 and 24 hours, outlined and filled' => <<<'BLADE'
             <div class="grid w-full gap-6 md:grid-cols-2">
                 <div class="grid content-start gap-4">
                     <x-timepicker label="Meeting starts" value="09:30" hint="The locale's clock" />
@@ -15,7 +15,7 @@
                 </div>
             </div>
             BLADE,
-        'Time pickers: steps and limits' => <<<'BLADE'
+        'Steps and limits' => <<<'BLADE'
             <div class="grid w-full gap-6 md:grid-cols-2">
                 <div class="grid content-start gap-4">
                     <x-timepicker label="Appointment" value="10:00" format="24" step="15" min="08:00" max="17:30" hint="Quarter hours from 08:00 to 17:30" />