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/PropertyDocBlockExtractorInterface.php

@@ -0,0 +1,36 @@
+<?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;
+
+use phpDocumentor\Reflection\DocBlock;
+
+/**
+ * Extract a property's doc block.
+ *
+ * A property's doc block may be located on a constructor promoted argument, on
+ * the property or on a mutator for that property.
+ *
+ * @author Tobias Nyholm <tobias.nyholm@gmail.com>
+ */
+interface PropertyDocBlockExtractorInterface
+{
+    /**
+     * Gets the first available doc block for a property. It finds the doc block
+     * by the following priority:
+     *  - constructor promoted argument,
+     *  - the class property,
+     *  - a mutator method for that property.
+     *
+     * If no doc block is found, it will return null.
+     */
+    public function getDocBlock(string $class, string $property): ?DocBlock;
+}