Size icons and shapes with a prop instead of a Tailwind class

<x-icon size> writes --md-icon-size (24px by default) and takes the optical-size-20
cut for 20px or less, as M3 asks; mirror-rtl flips a directional symbol. <x-shape
size> writes --md-shape-size. Both draw from plain-CSS stylesheets in
material.components, gathered in components.css until all.css replaces it; a
caller's size class still wins while the other components are rewritten.
Plan steps 35 and 36, the prop every component rewrite depends on.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Qwx5USif3wFFmxtHg5U1g9

workbench/resources/css/app.css

@@ -3,6 +3,7 @@
    `material` layers are declared first and sit below Tailwind's; tailwind.css brings the
    components still written for Tailwind, without declaring the tokens a second time. */
 @import '../../../resources/css/foundation.css';
+@import '../../../resources/css/components.css';
 @import 'tailwindcss' source(none);
 @import '../../../resources/css/tailwind.css';
 @import './material-scheme.css';