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/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Array_.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Array_ extends Cast {
+    public function getType(): string {
+        return 'Expr_Cast_Array';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Bool_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Bool_ extends Cast {
+    // For use in "kind" attribute
+    public const KIND_BOOL = 1; // "bool" syntax
+    public const KIND_BOOLEAN = 2; // "boolean" syntax
+
+    public function getType(): string {
+        return 'Expr_Cast_Bool';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Double.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Double extends Cast {
+    // For use in "kind" attribute
+    public const KIND_DOUBLE = 1; // "double" syntax
+    public const KIND_FLOAT = 2;  // "float" syntax
+    public const KIND_REAL = 3; // "real" syntax
+
+    public function getType(): string {
+        return 'Expr_Cast_Double';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Int_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Int_ extends Cast {
+    // For use in "kind" attribute
+    public const KIND_INT = 1; // "int" syntax
+    public const KIND_INTEGER = 2; // "integer" syntax
+
+    public function getType(): string {
+        return 'Expr_Cast_Int';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Object_.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Object_ extends Cast {
+    public function getType(): string {
+        return 'Expr_Cast_Object';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/String_.php

@@ -0,0 +1,15 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class String_ extends Cast {
+    // For use in "kind" attribute
+    public const KIND_STRING = 1; // "string" syntax
+    public const KIND_BINARY = 2; // "binary" syntax
+
+    public function getType(): string {
+        return 'Expr_Cast_String';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Unset_.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Unset_ extends Cast {
+    public function getType(): string {
+        return 'Expr_Cast_Unset';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Expr/Cast/Void_.php

@@ -0,0 +1,11 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Expr\Cast;
+
+use PhpParser\Node\Expr\Cast;
+
+class Void_ extends Cast {
+    public function getType(): string {
+        return 'Expr_Cast_Void';
+    }
+}