[Bug] REST API broken from recent code updates

[Sing-Li]

🐛 Bug

Following the latest doc to install mlc_chat.rest from nightly build, the script will crash when started with a model (doing --help works fine)

To Reproduce

Steps to reproduce the behavior:

1. create a new conda environment with python 3.11
2. follow latest doc to install nightly pip wheels
3. run the mlc_chat.rest on a small model

python -m mlc_chat.rest --model  mlc-chat-RedPajama-INCITE-Chat-3B-v1-q4f16_1
INFO:     Started server process [18484]
INFO:     Waiting for application startup.
ERROR:    Traceback (most recent call last):
  File "C:\Users\allmy\miniconda3\envs\restapi\Lib\site-packages\starlette\routing.py", line 677, in lifespan
    async with self.lifespan_context(app) as maybe_state:
  File "C:\Users\allmy\miniconda3\envs\restapi\Lib\contextlib.py", line 204, in __aenter__
    return await anext(self.gen)
           ^^^^^^^^^^^^^^^^^^^^^
  File "C:\Users\allmy\miniconda3\envs\restapi\Lib\site-packages\mlc_chat\rest.py", line 115, in lifespan
    chat_mod = ChatModule(
               ^^^^^^^^^^^
TypeError: ChatModule.__init__() got an unexpected keyword argument 'lib_path'

ERROR:    Application startup failed. Exiting.

Expected behavior

REST api to work as it had before recent code changes.

Environment

• Platform (e.g. WebGPU/Vulkan/IOS/Android/CUDA): Vulkan
• Operating system (e.g. Ubuntu/Windows/MacOS/...): Windows 11
• Device (e.g. iPhone 12 Pro, PC+RTX 3090, ...) Nvidia 2050
• How you installed MLC-LLM (conda, source): pip wheel
• How you installed TVM-Unity (pip, source): pip wheel
• Python version (e.g. 3.10): 3.11
• GPU driver version (if applicable):
• CUDA/cuDNN version (if applicable):
• TVM Unity Hash Tag (python -c "import tvm; print('\n'.join(f'{k}: {v}' for k, v in tvm.support.libinfo().items()))", applicable if you compile models):
• Any other relevant information:

Additional context