feat(archive): add rar extraction support

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

package-lock.json

@@ -28,6 +28,7 @@
         "mammoth": "^1.12.0",
         "markdown-it": "^15.0.0",
         "multer": "^2.2.0",
+        "node-unrar-js": "^2.0.2",
         "opentype.js": "^2.0.0",
         "pdf-lib": "^1.17.1",
         "pdfjs-dist": "^6.2.108",
@@ -5307,6 +5308,15 @@
       "devOptional": true,
       "license": "MIT"
     },
+    "node_modules/node-unrar-js": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/node-unrar-js/-/node-unrar-js-2.0.2.tgz",
+      "integrity": "sha512-hLNmoJzqaKJnod8yiTVGe9hnlNRHotUi0CreSv/8HtfRi/3JnRC8DvsmKfeGGguRjTEulhZK6zXX5PXoVuDZ2w==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/normalize-path": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",