[FEAT] Allow post parse mutations

We should allow post parse events to change the document.

(cherry picked from commit 441b1e0)

packages/guides/src/Event/PostParseDocument.php

@@ -22,17 +22,30 @@
  */
 final class PostParseDocument
 {
-    public function __construct(private readonly string $fileName, private readonly DocumentNode|null $documentNode)
-    {
+    public function __construct(
+        private readonly string $fileName,
+        private DocumentNode|null $documentNode,
+        private readonly string $originalFile,
+    ) {
     }
 
     public function getDocumentNode(): DocumentNode|null
     {
         return $this->documentNode;
     }
 
+    public function setDocumentNode(DocumentNode|null $documentNode): void
+    {
+        $this->documentNode = $documentNode;
+    }
+
     public function getFileName(): string
     {
         return $this->fileName;
     }
+
+    public function getOriginalFileName(): string
+    {
+        return $this->originalFile;
+    }
 }

packages/guides/src/Handlers/ParseFileHandler.php

@@ -103,7 +103,7 @@ private function createDocument(
             );
         }
 
-        $event = $this->eventDispatcher->dispatch(new PostParseDocument($fileName, $document));
+        $event = $this->eventDispatcher->dispatch(new PostParseDocument($fileName, $document, $path));
         assert($event instanceof PostParseDocument);
 
         return $event->getDocumentNode();