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/graphviz/composer.json

@@ -0,0 +1,39 @@
+{
+    "name": "phpdocumentor/graphviz",
+    "description": "Wrapper for Graphviz",
+    "type": "library",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Mike van Riel",
+            "email": "mike.vanriel@naenius.com"
+        }
+    ],
+    "require": {
+        "php": "^7.2 || ^8.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "phpDocumentor\\GraphViz\\": "src/phpDocumentor/GraphViz",
+            "phpDocumentor\\GraphViz\\PHPStan\\": "./src/phpDocumentor/PHPStan"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "phpDocumentor\\GraphViz\\Test\\": "./tests/phpDocumentor/GraphViz/Test",
+            "phpDocumentor\\GraphViz\\PHPStan\\": "./tests/phpDocumentor/PHPStan"
+        }
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^8.2 || ^9.2",
+        "mockery/mockery": "^1.2",
+        "phpstan/phpstan": "^0.12",
+        "ext-simplexml": "*",
+        "psalm/phar": "^4.15"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "2.x-dev"
+        }
+    }
+}