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/guides/src/RenderContext.php

@@ -0,0 +1,262 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * This file is part of phpDocumentor.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ * @link https://phpdoc.org
+ */
+
+namespace phpDocumentor\Guides;
+
+use Exception;
+use League\Flysystem\FilesystemInterface;
+use LogicException;
+use phpDocumentor\FileSystem\FileSystem;
+use phpDocumentor\Guides\Nodes\DocumentNode;
+use phpDocumentor\Guides\Nodes\DocumentTree\DocumentEntryNode;
+use phpDocumentor\Guides\Nodes\Node;
+use phpDocumentor\Guides\Nodes\ProjectNode;
+
+use function dirname;
+
+class RenderContext
+{
+    private DocumentNode $document;
+    /** @var DocumentNode[] */
+    private array $allDocuments;
+
+    private string $outputFilePath = '';
+
+    private Renderer\DocumentListIterator $iterator;
+
+    private function __construct(
+        private readonly string $destinationPath,
+        private readonly string|null $currentFileName,
+        private readonly FilesystemInterface|FileSystem $origin,
+        private readonly FilesystemInterface|FileSystem $destination,
+        private readonly string $outputFormat,
+        private readonly ProjectNode $projectNode,
+    ) {
+    }
+
+    /** @param DocumentNode[] $allDocumentNodes */
+    public static function forDocument(
+        DocumentNode $documentNode,
+        array $allDocumentNodes,
+        FilesystemInterface|FileSystem $origin,
+        FilesystemInterface|FileSystem $destination,
+        string $destinationPath,
+        string $ouputFormat,
+        ProjectNode $projectNode,
+    ): self {
+        $self = new self(
+            $destinationPath,
+            $documentNode->getFilePath(),
+            $origin,
+            $destination,
+            $ouputFormat,
+            $projectNode,
+        );
+
+        $self->document = $documentNode;
+        $self->allDocuments = $allDocumentNodes;
+        $self->outputFilePath =  $documentNode->getFilePath() . '.' . $ouputFormat;
+
+        return $self;
+    }
+
+    public function withDocument(DocumentNode $documentNode): self
+    {
+        return self::forDocument(
+            $documentNode,
+            $this->allDocuments,
+            $this->origin,
+            $this->destination,
+            $this->destinationPath,
+            $this->outputFormat,
+            $this->projectNode,
+        )->withIterator($this->getIterator());
+    }
+
+    public function getDocument(): DocumentNode
+    {
+        return $this->document;
+    }
+
+    /** @return DocumentNode[] */
+    public function getAllDocuments(): array
+    {
+        return $this->allDocuments;
+    }
+
+    public function withIterator(Renderer\DocumentListIterator $iterator): self
+    {
+        $that = clone $this;
+        $that->iterator = $iterator;
+
+        return $that;
+    }
+
+    /** @param DocumentNode[] $allDocumentNodes */
+    public static function forProject(
+        ProjectNode $projectNode,
+        array $allDocumentNodes,
+        FilesystemInterface|FileSystem $origin,
+        FilesystemInterface|FileSystem $destination,
+        string $destinationPath,
+        string $ouputFormat,
+    ): self {
+        $self = new self(
+            $destinationPath,
+            null,
+            $origin,
+            $destination,
+            $ouputFormat,
+            $projectNode,
+        );
+
+        $self->allDocuments = $allDocumentNodes;
+
+        return $self;
+    }
+
+    /**
+     * @param TType $default
+     *
+     * @phpstan-return TType|string|Node
+     *
+     * @template TType as mixed
+     */
+    public function getVariable(string $variable, mixed $default = null): mixed
+    {
+        return $this->document->getVariable($variable, $default);
+    }
+
+    public function getLink(string $name): string
+    {
+        $link = $this->document->getLink($name);
+
+        return $link ?? '';
+    }
+
+    public function getDirName(): string
+    {
+        $dirname = dirname($this->outputFilePath);
+
+        if ($dirname === '.') {
+            return '';
+        }
+
+        return $dirname;
+    }
+
+    public function hasCurrentFileName(): bool
+    {
+        return $this->currentFileName !== null;
+    }
+
+    public function getCurrentFileName(): string
+    {
+        if ($this->currentFileName === null) {
+            throw new LogicException('Cannot get current file name when not rendering a document');
+        }
+
+        return $this->currentFileName;
+    }
+
+    /** @return string[] */
+    public function getCurrentFileRootline(): array
+    {
+        if ($this->getCurrentDocumentEntry() === null) {
+            throw new LogicException('Cannot get current document entry when not rendering a document');
+        }
+
+        $rootline = [];
+        $documentEntry = $this->getCurrentDocumentEntry();
+        $rootline[] = $documentEntry->getFile();
+        while ($documentEntry->getParent() instanceof DocumentEntryNode) {
+            $documentEntry = $documentEntry->getParent();
+            $rootline[] = $documentEntry->getFile();
+        }
+
+        return $rootline;
+    }
+
+    /** @return array<string, string|null> */
+    public function getLoggerInformation(): array
+    {
+        return [
+            'rst-file' => $this->currentFileName,
+        ];
+    }
+
+    public function getOrigin(): FilesystemInterface|FileSystem
+    {
+        return $this->origin;
+    }
+
+    public function getCurrentDocumentEntry(): DocumentEntryNode|null
+    {
+        return $this->projectNode->findDocumentEntry($this->getCurrentFileName());
+    }
+
+    public function getDestinationPath(): string
+    {
+        return $this->destinationPath;
+    }
+
+    public function getDestination(): FilesystemInterface|FileSystem
+    {
+        return $this->destination;
+    }
+
+    public function getProjectNode(): ProjectNode
+    {
+        return $this->projectNode;
+    }
+
+    public function getDocumentNodeForEntry(DocumentEntryNode $entryNode): DocumentNode
+    {
+        $file = $entryNode->getFile();
+        foreach ($this->allDocuments as $child) {
+            if ($child->getDocumentEntry()->getFile() === $file) {
+                return $child;
+            }
+        }
+
+        throw new Exception('No document was found for document entry ' . $entryNode->getFile());
+    }
+
+    public function getRootDocumentNode(): DocumentNode
+    {
+        return $this->getDocumentNodeForEntry($this->getProjectNode()->getRootDocumentEntry());
+    }
+
+    public function getOutputFormat(): string
+    {
+        return $this->outputFormat;
+    }
+
+    public function getIterator(): Renderer\DocumentListIterator
+    {
+        return $this->iterator;
+    }
+
+    public function getOutputFilePath(): string
+    {
+        return $this->outputFilePath;
+    }
+
+    public function withOutputFilePath(string $outputFilePath): RenderContext
+    {
+        $that = clone$this;
+        $that->outputFilePath = $outputFilePath;
+
+        return $that;
+    }
+}