Add musa_simple Dockerfile for supporting Moore Threads GPU

[yeahdongcn]

Testing Done

• Build musa_simple docker image locally -> pass
• Run musa_simple container to serve llama3.2_1b_q8_0.gguf -> pass

  ❯ docker run --net=host --cap-add SYS_RESOURCE -e USE_MLOCK=0 -e MODEL=/models/llama3.2_1b_q8_0.gguf -e N_GPU_LAYERS=999 -v $HOME/models:/models -it musa_simple

• Access API server with curl -> pass

  ❯ curl -X 'POST'   'http://localhost:8000/v1/completions'   -H 'accept: application/json'   -H 'Content-Type: application/json'   -d '{
    "prompt": "\n\n### Instructions:\nWhat is the capital of France?\n\n### Response:\n",
    "stop": [
      "\n",
      "###"
    ]
  }'
  {"id":"cmpl-cf14c7fb-17d6-494a-97ef-8353492625ed","object":"text_completion","created":1732532988,"model":"/models/llama3.2_1b_q8_0.gguf","choices":[{"text":"Paris","index":0,"logprobs":null,"finish_reason":"stop"}],"usage":{"prompt_tokens":15,"completion_tokens":2,"total_tokens":17}}%    

Please refer to the attached screenshot for additional details.

[yeahdongcn]

@abetlen Hi Andrei, could you please review this PR? Thanks.