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/console/CommandLoader/ContainerCommandLoader.php

@@ -0,0 +1,55 @@
+<?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\Console\CommandLoader;
+
+use Psr\Container\ContainerInterface;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Exception\CommandNotFoundException;
+
+/**
+ * Loads commands from a PSR-11 container.
+ *
+ * @author Robin Chalas <robin.chalas@gmail.com>
+ */
+class ContainerCommandLoader implements CommandLoaderInterface
+{
+    private ContainerInterface $container;
+    private array $commandMap;
+
+    /**
+     * @param array $commandMap An array with command names as keys and service ids as values
+     */
+    public function __construct(ContainerInterface $container, array $commandMap)
+    {
+        $this->container = $container;
+        $this->commandMap = $commandMap;
+    }
+
+    public function get(string $name): Command
+    {
+        if (!$this->has($name)) {
+            throw new CommandNotFoundException(\sprintf('Command "%s" does not exist.', $name));
+        }
+
+        return $this->container->get($this->commandMap[$name]);
+    }
+
+    public function has(string $name): bool
+    {
+        return isset($this->commandMap[$name]) && $this->container->has($this->commandMap[$name]);
+    }
+
+    public function getNames(): array
+    {
+        return array_keys($this->commandMap);
+    }
+}