Draw the stat card without Tailwind

Plan step 36 (actions). <x-stat> renders data-md-stat with
data-md-stat-header/-value/-description/-extra; no class list.
stat.css draws the surface-container panel, the label-large header,
the value as an emphasized-headline-md hero with tabular figures, and
the body-small description. StatTest is rewritten on the hooks and
ComponentStylesheet.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

tests/Feature/Components/ActionStylesheetsTest.php

@@ -29,6 +29,7 @@ dataset('action components', [
     'toast',
     'progress',
     'alert',
+    'stat',
 ]);
 
 it('draws the component from a stylesheet shaped like every package stylesheet', function (string $name) {