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/dependency-injection/Loader/Configurator/AbstractServiceConfigurator.php

@@ -0,0 +1,115 @@
+<?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\DependencyInjection\Loader\Configurator;
+
+use Symfony\Component\DependencyInjection\Definition;
+use Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException;
+
+abstract class AbstractServiceConfigurator extends AbstractConfigurator
+{
+    protected $parent;
+    protected $id;
+    private array $defaultTags = [];
+
+    public function __construct(ServicesConfigurator $parent, Definition $definition, ?string $id = null, array $defaultTags = [])
+    {
+        $this->parent = $parent;
+        $this->definition = $definition;
+        $this->id = $id;
+        $this->defaultTags = $defaultTags;
+    }
+
+    public function __destruct()
+    {
+        // default tags should be added last
+        foreach ($this->defaultTags as $name => $attributes) {
+            foreach ($attributes as $attribute) {
+                $this->definition->addTag($name, $attribute);
+            }
+        }
+        $this->defaultTags = [];
+    }
+
+    /**
+     * Registers a service.
+     */
+    final public function set(?string $id, ?string $class = null): ServiceConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->set($id, $class);
+    }
+
+    /**
+     * Creates an alias.
+     */
+    final public function alias(string $id, string $referencedId): AliasConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->alias($id, $referencedId);
+    }
+
+    /**
+     * Registers a PSR-4 namespace using a glob pattern.
+     */
+    final public function load(string $namespace, string $resource): PrototypeConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->load($namespace, $resource);
+    }
+
+    /**
+     * Gets an already defined service definition.
+     *
+     * @throws ServiceNotFoundException if the service definition does not exist
+     */
+    final public function get(string $id): ServiceConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->get($id);
+    }
+
+    /**
+     * Removes an already defined service definition or alias.
+     */
+    final public function remove(string $id): ServicesConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->remove($id);
+    }
+
+    /**
+     * Registers a stack of decorator services.
+     *
+     * @param InlineServiceConfigurator[]|ReferenceConfigurator[] $services
+     */
+    final public function stack(string $id, array $services): AliasConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->stack($id, $services);
+    }
+
+    /**
+     * Registers a service.
+     */
+    final public function __invoke(string $id, ?string $class = null): ServiceConfigurator
+    {
+        $this->__destruct();
+
+        return $this->parent->set($id, $class);
+    }
+}