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/production_quantity_limits.svg

@@ -0,0 +1 @@
+<svg fill="currentColor" xmlns="http://www.w3.org/2000/svg" viewBox="0 -960 960 960"><path d="M280-80q-33 0-56.5-23.5T200-160q0-33 23.5-56.5T280-240q33 0 56.5 23.5T360-160q0 33-23.5 56.5T280-80Zm400 0q-33 0-56.5-23.5T600-160q0-33 23.5-56.5T680-240q33 0 56.5 23.5T760-160q0 33-23.5 56.5T680-80ZM120-800H80q-17 0-28.5-11.5T40-840q0-17 11.5-28.5T80-880h66q11 0 21 6t15 17l159 337h280l145-260q5-10 14-15t20-5q23 0 34.5 19.5t.5 39.5L692-482q-11 20-29.5 31T622-440H324l-44 80h440q17 0 28.5 11.5T760-320q0 17-11.5 28.5T720-280H280q-45 0-68.5-39t-1.5-79l54-98-144-304Zm360 220q-17 0-28.5-11.5T440-620q0-17 11.5-28.5T480-660q17 0 28.5 11.5T520-620q0 17-11.5 28.5T480-580Zm0-140q-17 0-28.5-11.5T440-760v-120q0-17 11.5-28.5T480-920q17 0 28.5 11.5T520-880v120q0 17-11.5 28.5T480-720Z"/></svg>