GitLab

* feat: manager docs with sphinx

* fix: readthedocs configure

* feat: support multiple language

* fix: add .readthedocs.yaml

* fix: requirments.txt path

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Co-authored-by: icecraft <xurui1@pjlab.org.cn>

- Add scripts to download models and update configuration file
- Remove manual steps for modifying model paths
- Update documentation for both ModelScope and HuggingFace model downloads
- Improve user experience by automating the entire process

- Add function to get local LayoutReader model directory- Check and use local model directory if available
- Fall back to online model if local directory not found
- Update model initialization to support local path
- Refactor model loading in singleton class