Add the Material 3 Expressive foundation

Colour, shape, type, elevation and motion as tokens and Tailwind
utilities; `php artisan material:scheme`, which generates an app's colour
roles with Google's material-color-utilities (spec 2025); the theme head
script with light, dark and system and its Alpine store; Google Sans Flex;
every Material Symbol (4,135, outlined and filled) drawn by <x-icon>
without blade-icons; all 35 M3 Expressive shapes, ported from androidx, as
<x-shape>; the x-figure directive; the Toasts concern; DesignGuard for
applications' tests; and a showcase with every token, both themes side by
side and an icon search.

Colour utilities are `@theme inline`, so a section with its own
data-theme repaints; without it they resolve once on :root.

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

tests/Feature/DesignGuardTest.php

@@ -0,0 +1,48 @@
+<?php
+
+use NoNameWeb\LivewireMaterial\Testing\DesignGuard;
+
+const GUARD_FIXTURES = __DIR__.'/../Fixtures/design-guard';
+
+/**
+ * @param  list<string>  $violations
+ * @return list<string>
+ */
+function fixtureRelative(array $violations): array
+{
+    return array_map(fn (string $violation): string => str_replace(realpath(GUARD_FIXTURES).'/', '', $violation), $violations);
+}
+
+it('finds what compiles to nothing', function () {
+    expect(fixtureRelative(DesignGuard::scan(realpath(GUARD_FIXTURES))->violations()))->toBe([
+        'app/Status.php:14 colour the theme does not declare `text-red-500`',
+        'views/page.blade.php:3 daisyUI class `card`',
+        'views/page.blade.php:6 daisyUI class `btn-primary`',
+        'views/page.blade.php:4 unknown Material Symbol `o-home`',
+        'views/page.blade.php:5 unknown Material Symbol `not_a_symbol`',
+        'views/page.blade.php:2 maryUI component `<x-mary-button`',
+        'views/page.blade.php:3 colour the theme does not declare `bg-base-200`',
+        'views/page.blade.php:6 colour the theme does not declare `text-red-600`',
+    ]);
+});
+
+it('bans the roles an application leaves out', function () {
+    $violations = fixtureRelative(DesignGuard::scan(realpath(GUARD_FIXTURES.'/views'))
+        ->forbidColours(['tertiary'])
+        ->violations());
+
+    expect($violations)->toContain('views/page.blade.php:7 colour the theme does not declare `text-tertiary`');
+});
+
+it('bans any further pattern', function () {
+    $violations = fixtureRelative(DesignGuard::scan(realpath(GUARD_FIXTURES.'/views'))
+        ->forbid('/\bfocus-ring\b/', 'a retired utility')
+        ->violations());
+
+    expect($violations)->toContain('views/page.blade.php:7 a retired utility');
+});
+
+it('passes the package\'s own views', function () {
+    expect(DesignGuard::scan([__DIR__.'/../../resources/views', __DIR__.'/../../resources/js', __DIR__.'/../../src'])->violations())
+        ->toBe([]);
+});