Run Parakeet TDT in the inference worker via parakeet.js on the shared onnxruntime-web

Adds parakeet.js 1.4.4 (MIT) as a devDependency bundled into the worker
only; a build plugin keeps its own onnxruntime-web copy out of the bundle.
Includes an opt-in real-model test (PARAKEET_REAL=1).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -25,6 +25,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "ffmpeg-static": "^5.3.0",
+    "parakeet.js": "1.4.4",
     "typescript": "^7.0.2"
   },
   "trustedDependencies": [