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

src/Concerns/Toasts.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace NoNameWeb\LivewireMaterial\Concerns;
+
+/**
+ * A short message after something happened — "Saved", "Link copied" — shown by the snackbar.
+ *
+ * The four method names and arguments are maryUI's `Toast` trait's, so moving to this is a
+ * find-and-replace. The message is a `toast` browser event, dispatched rather than evaluated
+ * as JavaScript, so a test can see it (`assertDispatched('toast')`). It survives
+ * `redirectTo`: the redirect is a wire:navigate, and the event dispatched on the way out is
+ * still on screen when the next page arrives.
+ *
+ * The methods are protected, where maryUI's were public: a public method on a Livewire
+ * component is an action anyone can call from the browser.
+ */
+trait Toasts
+{
+    protected function success(string $title, ?string $description = null, int $timeout = 4000, ?string $redirectTo = null): void
+    {
+        $this->toast('success', $title, $description, $timeout, $redirectTo);
+    }
+
+    protected function warning(string $title, ?string $description = null, int $timeout = 4000, ?string $redirectTo = null): void
+    {
+        $this->toast('warning', $title, $description, $timeout, $redirectTo);
+    }
+
+    protected function error(string $title, ?string $description = null, int $timeout = 4000, ?string $redirectTo = null): void
+    {
+        $this->toast('error', $title, $description, $timeout, $redirectTo);
+    }
+
+    protected function info(string $title, ?string $description = null, int $timeout = 4000, ?string $redirectTo = null): void
+    {
+        $this->toast('info', $title, $description, $timeout, $redirectTo);
+    }
+
+    private function toast(string $type, string $title, ?string $description, int $timeout, ?string $redirectTo): void
+    {
+        $this->dispatch('toast', type: $type, title: $title, description: $description, timeout: $timeout);
+
+        if ($redirectTo !== null) {
+            $this->redirect($redirectTo, navigate: true);
+        }
+    }
+}