Leave a Markdown mail component's classes to the mail theme in the design guard

A mail component is drawn by the mail theme, not by the application's
CSS entry, and the theme's classes share Tailwind's names: ReStride's
`x-mail::sessions` wraps its table in `<div class="table">`, the class
the package's own mail theme styles, and the guard reported it as
Tailwind's `display: table`. A view under a path `mail.markdown.paths`
names (Laravel's `resources/views/vendor/mail` by default) now skips
family (i) and the breakpoint, scale, palette and colour-value checks;
its icon names, the directives in its component tags, forbidColours()
and forbid() are still read. A mail theme stylesheet under that path,
which has to write literal values, is left out of check (iii) and of
the exempt classes, so its `.table` no longer hides `table` in the
application's other views either. The guard's docblock, the README and
the skill's "Testing the design" say so; a fixture test reads the same
mail view and theme with and without the path configured.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

README.md

@@ -150,7 +150,7 @@ it('uses only what compiles', function () {
 });
 ```
 
-The guard reads every path it is given and fails, with `path:line` and the 2.0.0 replacement, on any Tailwind utility or variant still in a view, PHP or JS file, a colour of the application's own Tailwind theme (`bg-brand`) included — none compiles, since the application carries no Tailwind — and on 1.x's own utilities (`type-body-md`, `text-meta`, `rounded-corner-lg`, `focus-ring`): a layout component and prop (`flex gap-4` → `<x-row gap="space200">`), an `md-*` class (`truncate` → `md-truncate`), or a token for the application's own CSS (`rounded-lg` → `var(--md-sys-shape-corner-lg)`). A class the application's own stylesheets declare is exempt. In the `.css` files it is given (`material-scheme.css` skipped) it fails on a literal colour, radius, shadow, font, easing or duration, and on a media query off M3's 600/840/1200/1600px; a `var()`, or a `calc()`/`min()`/`max()`/`clamp()` built on one, is fine. It also fails on unknown Material Symbol names and Blade directives written inside component tags.
+The guard reads every path it is given and fails, with `path:line` and the 2.0.0 replacement, on any Tailwind utility or variant still in a view, PHP or JS file, a colour of the application's own Tailwind theme (`bg-brand`) included — none compiles, since the application carries no Tailwind — and on 1.x's own utilities (`type-body-md`, `text-meta`, `rounded-corner-lg`, `focus-ring`): a layout component and prop (`flex gap-4` → `<x-row gap="space200">`), an `md-*` class (`truncate` → `md-truncate`), or a token for the application's own CSS (`rounded-lg` → `var(--md-sys-shape-corner-lg)`). A class the application's own stylesheets declare is exempt. In the `.css` files it is given (`material-scheme.css` skipped) it fails on a literal colour, radius, shadow, font, easing or duration, and on a media query off M3's 600/840/1200/1600px; a `var()`, or a `calc()`/`min()`/`max()`/`clamp()` built on one, is fine. It also fails on unknown Material Symbol names and Blade directives written inside component tags. Markdown mail components (under `mail.markdown.paths`, `resources/views/vendor/mail` by default) are the mail theme's to style: their classes are not read as Tailwind, and a mail theme stylesheet there is neither checked for literals nor a source of exempt classes.
 
 `missingStylesheets($cssEntry)` checks the entry's relative `@import` graph, followed through every package file's own imports, against the package tags the views render (unprefixed, under the configured prefix, or `<x-livewire-material::…>`) and `->links()`, and names each missing `@import` line once; a tag the application shadows with its own component is reported instead. It reads imports only, so leave `resource_path('css')` out of `scan()` while the stylesheets still hold literals. `forbidColours([...])` names roles the application leaves out, and fails wherever one (with its `on-` and container roles) is still written: `var(--md-sys-color-…)` in CSS or an inline `style`, its `md-ink-*` class, or a component's `color`/`tone` prop. `forbid($pattern, $reason)` adds any pattern of your own, line by line.