Scaffold the Livewire Material package

The skeleton for nonameweb/livewire-material: service provider and config
(unprefixed components, blade-icons' own <x-icon> switched off, an opt-in
showcase at /material), the Testbench Workbench with its Vite build, the
CSS and JS entry points applications import, the Boost guideline and skill
with a drift test, and Gitea CI running Pint, feature tests on PHP 8.4 and
8.5, and browser tests in Chrome, Firefox and Safari.

The plan moved here from SealShare: docs/plans/livewire-material.md.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V9NnLxnPp8vaaurb3Z1MFy

phpunit.xml

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         bootstrap="vendor/autoload.php"
+         colors="true"
+         cacheDirectory=".phpunit.cache"
+>
+    <testsuites>
+        <testsuite name="Feature">
+            <directory>tests/Feature</directory>
+        </testsuite>
+        <!-- Real browsers, driven by Playwright against the Workbench showcase. Needs
+             `npm run build` first; CI runs it once per engine (chrome, firefox, safari). -->
+        <testsuite name="Browser">
+            <directory>tests/Browser</directory>
+        </testsuite>
+    </testsuites>
+    <source>
+        <include>
+            <directory>src</directory>
+        </include>
+    </source>
+    <php>
+        <env name="APP_ENV" value="testing"/>
+        <env name="APP_KEY" value="base64:NgopikxwbRspVdKjfygJXbjOPjSgXAU2Nrf9STNYiew="/>
+        <env name="MATERIAL_SHOWCASE" value="true"/>
+    </php>
+</phpunit>