Adapt for DeepSeek-R1

[StephenXie]

• Added support for deepseek-reasoner
• Requires DEEPSEEK_API_KEY in .env
• Successfully ran inference_and_check (example of running inference with deepseek-reasoner on APPS dataset)
  • python skythought/tools/inference_and_check.py --dataset APPS --model deepseek-reasoner --tp 2 --max_tokens 8192 --split test --source all --end 50 --result-dir ./data --inference
• Ran eval.py on AIME and GPDADiamond and accuracy match official results
  • python eval.py --model deepseek-reasoner --evals=AIME,GPQADiamond --tp=2 --output_file=results.txt --temperatures 0.7
    
    

[kouroshHakha]

Thanks @StephenXie for your contribution, but the foundation to be able to add other non-openai api clients is not setup for this repo yet. We need to first finish a few refactoring efforts (like #47) that we have in line before we can add more models through api.