GitLab

- Update image path in README.md and README_zh-CN.md
- Update chemical formula recognition link in README.md and README_zh-CN.md

* 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>

* feat: refractor cli command

* feat: add docs to describe the output files of cli

* feat: resove review comments

* feat: updat docs about middle.json

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