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/event-dispatcher/composer.json

@@ -0,0 +1,47 @@
+{
+    "name": "symfony/event-dispatcher",
+    "type": "library",
+    "description": "Provides tools that allow your application components to communicate with each other by dispatching events and listening to them",
+    "keywords": [],
+    "homepage": "https://symfony.com",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Fabien Potencier",
+            "email": "fabien@symfony.com"
+        },
+        {
+            "name": "Symfony Community",
+            "homepage": "https://symfony.com/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=8.1",
+        "symfony/event-dispatcher-contracts": "^2.5|^3"
+    },
+    "require-dev": {
+        "symfony/dependency-injection": "^5.4|^6.0|^7.0",
+        "symfony/expression-language": "^5.4|^6.0|^7.0",
+        "symfony/config": "^5.4|^6.0|^7.0",
+        "symfony/error-handler": "^5.4|^6.0|^7.0",
+        "symfony/http-foundation": "^5.4|^6.0|^7.0",
+        "symfony/service-contracts": "^2.5|^3",
+        "symfony/stopwatch": "^5.4|^6.0|^7.0",
+        "psr/log": "^1|^2|^3"
+    },
+    "conflict": {
+        "symfony/dependency-injection": "<5.4",
+        "symfony/service-contracts": "<2.5"
+    },
+    "provide": {
+        "psr/event-dispatcher-implementation": "1.0",
+        "symfony/event-dispatcher-implementation": "2.0|3.0"
+    },
+    "autoload": {
+        "psr-4": { "Symfony\\Component\\EventDispatcher\\": "" },
+        "exclude-from-classmap": [
+            "/Tests/"
+        ]
+    },
+    "minimum-stability": "dev"
+}