feat(archive): add rar extraction support

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/converters/archive.js

@@ -6,6 +6,7 @@ import AdmZip from 'adm-zip';
 import { ZipArchive } from 'archiver';
 import * as tar from 'tar';
 import _7z from '7zip-min';
+import { createExtractorFromFile } from 'node-unrar-js';
 import { register } from './registry.js';
 
 const MAX_EXTRACTED_BYTES = 2 * 1024 * 1024 * 1024;
@@ -133,6 +134,15 @@ async function createTar7z(srcDir, outputPath, quality) {
   }
 }
 
+async function extractRar(inputPath, destDir) {
+  const extractor = await createExtractorFromFile({ filepath: inputPath, targetPath: destDir });
+  const { files } = extractor.extract();
+  for (const _file of files) {
+    // Iterating fully is required: node-unrar-js writes each entry to disk
+    // lazily as this generator is advanced.
+  }
+}
+
 const EXTRACTORS = {
   zip: extractZip,
   tar: extractTarLike,
@@ -140,6 +150,7 @@ const EXTRACTORS = {
   'tar.bz2': extractTarBz2,
   '7z': extract7z,
   'tar.7z': extractTar7z,
+  rar: extractRar,
 };
 const CREATORS = {
   zip: createZip,