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/phpdocumentor/guides/resources/config/command_bus.php

@@ -0,0 +1,65 @@
+<?php
+
+declare(strict_types=1);
+
+use League\Tactician\CommandBus;
+use League\Tactician\Handler\CommandHandlerMiddleware;
+use League\Tactician\Handler\CommandNameExtractor\ClassNameExtractor;
+use League\Tactician\Handler\MethodNameInflector\HandleInflector;
+use League\Tactician\Plugins\LockingMiddleware;
+use phpDocumentor\Guides\DependencyInjection\CommandLocator;
+use phpDocumentor\Guides\FileCollector;
+use phpDocumentor\Guides\Handlers\CompileDocumentsCommand;
+use phpDocumentor\Guides\Handlers\CompileDocumentsHandler;
+use phpDocumentor\Guides\Handlers\ParseDirectoryCommand;
+use phpDocumentor\Guides\Handlers\ParseDirectoryHandler;
+use phpDocumentor\Guides\Handlers\ParseFileCommand;
+use phpDocumentor\Guides\Handlers\ParseFileHandler;
+use phpDocumentor\Guides\Handlers\RenderCommand;
+use phpDocumentor\Guides\Handlers\RenderDocumentCommand;
+use phpDocumentor\Guides\Handlers\RenderDocumentHandler;
+use phpDocumentor\Guides\Handlers\RenderHandler;
+use Psr\EventDispatcher\EventDispatcherInterface;
+use Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator;
+
+use function Symfony\Component\DependencyInjection\Loader\Configurator\inline_service;
+use function Symfony\Component\DependencyInjection\Loader\Configurator\service;
+use function Symfony\Component\DependencyInjection\Loader\Configurator\tagged_locator;
+
+return static function (ContainerConfigurator $container): void {
+    $container->services()
+        ->defaults()->autowire()
+
+        ->set(ParseFileHandler::class)
+        ->tag('phpdoc.guides.command', ['command' => ParseFileCommand::class])
+
+        ->set(ParseDirectoryHandler::class)
+        ->args([inline_service(FileCollector::class)->autowire()])
+        ->tag('phpdoc.guides.command', ['command' => ParseDirectoryCommand::class])
+
+        ->set(RenderHandler::class)
+        ->tag('phpdoc.guides.command', ['command' => RenderCommand::class])
+
+        ->set(CompileDocumentsHandler::class)
+        ->tag('phpdoc.guides.command', ['command' => CompileDocumentsCommand::class])
+
+        ->set(RenderDocumentHandler::class)
+        ->tag('phpdoc.guides.command', ['command' => RenderDocumentCommand::class])
+        ->arg('$renderer', service('phpdoc.guides.output_node_renderer'))
+        ->arg('$eventDispatcher', service(EventDispatcherInterface::class))
+
+        ->set(CommandBus::class)
+        ->args([
+            [
+                inline_service(CommandHandlerMiddleware::class)
+                ->args([
+                    inline_service(ClassNameExtractor::class),
+                    inline_service(CommandLocator::class)->args(
+                        [tagged_locator('phpdoc.guides.command', 'command')],
+                    ),
+                    inline_service(HandleInflector::class),
+                ]),
+                inline_service(LockingMiddleware::class),
+            ],
+        ]);
+};