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

resources/svg/symbols/outlined/nest_cam_iq_outdoor.svg

@@ -0,0 +1 @@
+<svg fill="currentColor" xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960"><path d="M563-150q-11 13-27.5 14.5T506-145L353-273q-50-42-72-102t-11-123l-56-47q-12-11-13.5-26.5T209-600h-49v80q0 33-23.5 56.5T80-440v-400q33 0 56.5 23.5T160-760v80h115l62-75q11-13 27.5-14.5T394-760l55 46q61-23 124-12t113 53l153 128q13 11 14.5 27.5T844-489L563-150Zm-36-83 231-277-124-102q-42-34-95.5-33T434-623l-61-50-77 92 60 50q-12 54-3 107.5t51 88.5l123 102Zm0-220Z"/></svg>