refactor: Cleanup git state - commit all staged changes

Major refactoring cleanup:
- Add new controller architecture (class-controller-*.php)
- Add new settings-v2 UI (views/settings-v2/)
- Add new CSS architecture (agentic-sidebar.css, tokens)
- Add esbuild build pipeline (scripts/build.js, package.json)
- Add composer dependencies (vendor/)
- Add frontend src directory (assets/js/src/index.jsx)
- Add documentation files
- Remove old/obsolete files (class-settings.php, old CSS)

This commits all pending changes from previous refactoring efforts.

vendor/symfony/routing/Matcher/RequestMatcherInterface.php

@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Routing\Matcher;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Routing\Exception\MethodNotAllowedException;
+use Symfony\Component\Routing\Exception\NoConfigurationException;
+use Symfony\Component\Routing\Exception\ResourceNotFoundException;
+
+/**
+ * RequestMatcherInterface is the interface that all request matcher classes must implement.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+interface RequestMatcherInterface
+{
+    /**
+     * Tries to match a request with a set of routes.
+     *
+     * If the matcher cannot find information, it must throw one of the exceptions documented
+     * below.
+     *
+     * @throws NoConfigurationException  If no routing configuration could be found
+     * @throws ResourceNotFoundException If no matching resource could be found
+     * @throws MethodNotAllowedException If a matching resource was found but the request method is not allowed
+     */
+    public function matchRequest(Request $request): array;
+}