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

package.json

@@ -4,10 +4,14 @@
     "type": "module",
     "scripts": {
         "build": "vite build",
-        "dev": "vite"
+        "dev": "vite",
+        "build:scheme": "esbuild bin/scheme.mjs --bundle --platform=node --format=esm --target=node20 --minify --legal-comments=eof --outfile=resources/node/scheme.mjs",
+        "build:shapes": "node bin/shapes.mjs"
     },
     "devDependencies": {
+        "@material/material-color-utilities": "^0.4.0",
         "@tailwindcss/vite": "^4.3.3",
+        "esbuild": "^0.28.2",
         "laravel-vite-plugin": "^3.2.0",
         "playwright": "^1.62.1",
         "tailwindcss": "^4.3.3",