Add CSAI

[LinglongQian]

1. Model description

CSAI should be included in PyPOTS as an imputation model.

@article{qian2023knowledge,
  title={Knowledge Enhanced Conditional Imputation for Healthcare Time-series},
  author={Qian, Linglong and Ibrahim, Zina and Ellis, Hugh Logan and Zhang, Ao and Zhang, Yuezhou and Wang, Tao and Dobson, Richard},
  journal={arXiv preprint arXiv:2312.16713},
  year={2023}
}

2. Check open-source status

• The model implementation is publicly available

3. Provide useful information for the implementation

https://github.com/LINGLONGQIAN/CSAI

[github-actions]

Hi there 👋,

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Best,
Wenjie

[WenjieDu]

Hi @LinglongQian @joseph-arulraj, I found that CSAI cannot accept dataset files for lazy loading because normalization mean and std need to be calculated ahead, as mentioned in issue #544. I fixed this in PR #545. Have a review please.