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/TraitUseAdaptation/Alias.php

@@ -0,0 +1,37 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Stmt\TraitUseAdaptation;
+
+use PhpParser\Node;
+
+class Alias extends Node\Stmt\TraitUseAdaptation {
+    /** @var null|int New modifier */
+    public ?int $newModifier;
+    /** @var null|Node\Identifier New name */
+    public ?Node\Identifier $newName;
+
+    /**
+     * Constructs a trait use precedence adaptation node.
+     *
+     * @param null|Node\Name $trait Trait name
+     * @param string|Node\Identifier $method Method name
+     * @param null|int $newModifier New modifier
+     * @param null|string|Node\Identifier $newName New name
+     * @param array<string, mixed> $attributes Additional attributes
+     */
+    public function __construct(?Node\Name $trait, $method, ?int $newModifier, $newName, array $attributes = []) {
+        $this->attributes = $attributes;
+        $this->trait = $trait;
+        $this->method = \is_string($method) ? new Node\Identifier($method) : $method;
+        $this->newModifier = $newModifier;
+        $this->newName = \is_string($newName) ? new Node\Identifier($newName) : $newName;
+    }
+
+    public function getSubNodeNames(): array {
+        return ['trait', 'method', 'newModifier', 'newName'];
+    }
+
+    public function getType(): string {
+        return 'Stmt_TraitUseAdaptation_Alias';
+    }
+}

vendor/nikic/php-parser/lib/PhpParser/Node/Stmt/TraitUseAdaptation/Precedence.php

@@ -0,0 +1,33 @@
+<?php declare(strict_types=1);
+
+namespace PhpParser\Node\Stmt\TraitUseAdaptation;
+
+use PhpParser\Node;
+
+class Precedence extends Node\Stmt\TraitUseAdaptation {
+    /** @var Node\Name[] Overwritten traits */
+    public array $insteadof;
+
+    /**
+     * Constructs a trait use precedence adaptation node.
+     *
+     * @param Node\Name $trait Trait name
+     * @param string|Node\Identifier $method Method name
+     * @param Node\Name[] $insteadof Overwritten traits
+     * @param array<string, mixed> $attributes Additional attributes
+     */
+    public function __construct(Node\Name $trait, $method, array $insteadof, array $attributes = []) {
+        $this->attributes = $attributes;
+        $this->trait = $trait;
+        $this->method = \is_string($method) ? new Node\Identifier($method) : $method;
+        $this->insteadof = $insteadof;
+    }
+
+    public function getSubNodeNames(): array {
+        return ['trait', 'method', 'insteadof'];
+    }
+
+    public function getType(): string {
+        return 'Stmt_TraitUseAdaptation_Precedence';
+    }
+}