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/filled/tools_pliers_wire_stripper.svg

@@ -0,0 +1 @@
+<svg fill="currentColor" xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960"><path d="M280-40q-20-40-30-98t-10-118q0-99 22-163.5T320-520v-200l120-200h20v206q-10 5-15 14t-5 20q0 17 11.5 28.5T480-640q17 0 28.5-11.5T520-680q0-11-5-20t-15-14v-206h20l120 200v200q37 36 58.5 100.5T720-256q0 60-10 118t-30 98q-42-13-67-47.5T589-166q0-25 5.5-54t5.5-58q0-58-31.5-122T480-520q-56 56-88 120t-32 122q0 29 6 58t7 54q0 44-25.5 79T280-40Z"/></svg>