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/Stmt/ClassConst.php

@@ -0,0 +1,77 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Stmt;
+
+use PhpParser\Modifiers;
+use PhpParser\Node;
+
+class ClassConst extends Node\Stmt {
+    /** @var int Modifiers */
+    public int $flags;
+    /** @var Node\Const_[] Constant declarations */
+    public array $consts;
+    /** @var Node\AttributeGroup[] PHP attribute groups */
+    public array $attrGroups;
+    /** @var Node\Identifier|Node\Name|Node\ComplexType|null Type declaration */
+    public ?Node $type;
+
+    /**
+     * Constructs a class const list node.
+     *
+     * @param Node\Const_[] $consts Constant declarations
+     * @param int $flags Modifiers
+     * @param array<string, mixed> $attributes Additional attributes
+     * @param list<Node\AttributeGroup> $attrGroups PHP attribute groups
+     * @param null|Node\Identifier|Node\Name|Node\ComplexType $type Type declaration
+     */
+    public function __construct(
+        array $consts,
+        int $flags = 0,
+        array $attributes = [],
+        array $attrGroups = [],
+        ?Node $type = null
+    ) {
+        $this->attributes = $attributes;
+        $this->flags = $flags;
+        $this->consts = $consts;
+        $this->attrGroups = $attrGroups;
+        $this->type = $type;
+    }
+
+    public function getSubNodeNames(): array {
+        return ['attrGroups', 'flags', 'type', 'consts'];
+    }
+
+    /**
+     * Whether constant is explicitly or implicitly public.
+     */
+    public function isPublic(): bool {
+        return ($this->flags & Modifiers::PUBLIC) !== 0
+            || ($this->flags & Modifiers::VISIBILITY_MASK) === 0;
+    }
+
+    /**
+     * Whether constant is protected.
+     */
+    public function isProtected(): bool {
+        return (bool) ($this->flags & Modifiers::PROTECTED);
+    }
+
+    /**
+     * Whether constant is private.
+     */
+    public function isPrivate(): bool {
+        return (bool) ($this->flags & Modifiers::PRIVATE);
+    }
+
+    /**
+     * Whether constant is final.
+     */
+    public function isFinal(): bool {
+        return (bool) ($this->flags & Modifiers::FINAL);
+    }
+
+    public function getType(): string {
+        return 'Stmt_ClassConst';
+    }
+}