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/property-info/Extractor/ConstructorExtractor.php

@@ -0,0 +1,59 @@
+<?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\PropertyInfo\Extractor;
+
+use Symfony\Component\PropertyInfo\PropertyTypeExtractorInterface;
+use Symfony\Component\TypeInfo\Type;
+
+/**
+ * Extracts the constructor argument type using ConstructorArgumentTypeExtractorInterface implementations.
+ *
+ * @author Dmitrii Poddubnyi <dpoddubny@gmail.com>
+ */
+final class ConstructorExtractor implements PropertyTypeExtractorInterface
+{
+    /**
+     * @param iterable<int, ConstructorArgumentTypeExtractorInterface> $extractors
+     */
+    public function __construct(
+        private readonly iterable $extractors = [],
+    ) {
+    }
+
+    public function getType(string $class, string $property, array $context = []): ?Type
+    {
+        foreach ($this->extractors as $extractor) {
+            if (null !== $value = $extractor->getTypeFromConstructor($class, $property)) {
+                return $value;
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * @deprecated since Symfony 7.3, use "getType" instead
+     */
+    public function getTypes(string $class, string $property, array $context = []): ?array
+    {
+        trigger_deprecation('symfony/property-info', '7.3', 'The "%s()" method is deprecated, use "%s::getType()" instead.', __METHOD__, self::class);
+
+        foreach ($this->extractors as $extractor) {
+            $value = $extractor->getTypesFromConstructor($class, $property);
+            if (null !== $value) {
+                return $value;
+            }
+        }
+
+        return null;
+    }
+}