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/drive_file_move_rtl.svg

@@ -0,0 +1 @@
+<svg fill="currentColor" xmlns="http://www.w3.org/2000/svg"><path d="M12.725 16.325q.275-.275.275-.7 0-.425-.275-.7L11.8 14H15q.425 0 .713-.288Q16 13.425 16 13t-.287-.713Q15.425 12 15 12h-3.2l.925-.925q.275-.275.275-.7 0-.425-.275-.7-.275-.275-.7-.275-.425 0-.7.275L8.7 12.3q-.275.275-.275.7 0 .425.275.7l2.625 2.625q.275.275.7.275.425 0 .7-.275ZM4 20q-.825 0-1.412-.587Q2 18.825 2 18V6q0-.825.588-1.412Q3.175 4 4 4h5.175q.4 0 .763.15.362.15.637.425L12 6h8q.825 0 1.413.588Q22 7.175 22 8v10q0 .825-.587 1.413Q20.825 20 20 20Z"/></svg>