Upgrade @huggingface/transformers to v4.0.0-next.8 for Qwen3.5 support (#59)

* Initial plan

* fix: upgrade @huggingface/transformers to next (v4.0.0-next.8) for Qwen3.5 support

Fixes two errors when loading onnx-community/Qwen3.5-0.8B-ONNX:
- Unknown tokenizer class "TokenizersBackend" (v4 adds @huggingface/tokenizers dep)
- Unsupported model type: qwen3_5 (v4 adds qwen3_5 model type support)

Updates bun.lock with all new transitive dependencies:
- @huggingface/tokenizers@0.1.3 (new)
- onnxruntime-web@1.25.0-dev.20260307-d626b568e0
- onnxruntime-node@1.24.3
- onnxruntime-common@1.24.3
- adm-zip@0.5.16 (new dep of onnxruntime-node 1.24.3)

All 250 tests pass. TypeScript and ESLint clean.

Co-authored-by: devlux76 <86517969+devlux76@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: devlux76 <86517969+devlux76@users.noreply.github.com>

Author: Copilot

bun.lock

@@ -45,7 +45,13 @@
     "type": "git",
     "url": "git+https://github.com/devlux76/q2.git"
   },
-  "keywords": ["llm", "onnx", "transformers", "wasm", "quaternary-quantization"],
+  "keywords": [
+    "llm",
+    "onnx",
+    "transformers",
+    "wasm",
+    "quaternary-quantization"
+  ],
   "license": "MIT",
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.5",
@@ -69,6 +75,6 @@
     "vitest": "latest"
   },
   "dependencies": {
-    "@huggingface/transformers": "latest"
+    "@huggingface/transformers": "^4.0.0-next.8"
   }
 }