feat(w2): add PackService for .novel and .novel-all export/import

Introduce pack-bootstrap chunk, ZipArchive-based PackService with progress IPC,
book registry import helpers, and IT-PACK-01 / IT-ALL-02 integration tests.

Co-authored-by: Cursor <cursoragent@cursor.com>

package.json

@@ -28,10 +28,12 @@
     "@tiptap/extension-underline": "^3.27.1",
     "@tiptap/react": "^3.27.1",
     "@tiptap/starter-kit": "^3.27.1",
+    "archiver": "^8.0.0",
     "cytoscape": "^3.34.0",
     "cytoscape-cose-bilkent": "^4.1.0",
     "diff-match-patch": "^1.0.5",
     "electron": "^36.9.0",
+    "extract-zip": "^2.0.1",
     "i18next": "^24.2.3",
     "jotai": "^2.12.1",
     "mammoth": "^1.12.0",
@@ -44,8 +46,10 @@
   },
   "devDependencies": {
     "@playwright/test": "^1.51.0",
+    "@types/archiver": "^8.0.0",
     "@types/cytoscape": "^3.21.9",
     "@types/diff-match-patch": "^1.0.36",
+    "@types/extract-zip": "^2.0.0",
     "@types/marked": "^6.0.0",
     "@types/node": "^22.13.0",
     "@types/react": "^18.3.18",