refactor: extract asar from electron-builder output instead of custom script

package.json

@@ -17,7 +17,6 @@
     "dist:win": "npm run build && electron-builder --win",
     "dist:linux": "npm run build && electron-builder --linux",
     "dist:all": "npm run build && electron-builder --win --linux",
-    "build:asar": "node scripts/build-asar.js",
     "clean": "rimraf dist out",
     "lint": "eslint src/",
     "prepare": "husky"
@@ -29,7 +28,6 @@
     "electron-store": "^8.2.0"
   },
   "devDependencies": {
-    "@electron/asar": "^4.2.0",
     "@eslint/js": "^10.0.1",
     "@types/node": "^22.0.0",
     "electron": "npm:electron-nightly@42.0.0-nightly.20260227",