### What problem does this PR solve?
**Added openapi specification for API routes. This creates swagger UI
similar to FastAPI to better use the API.**
Using python package `flasgger`
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Not all routes are included since this is a work in progress.
Docs can be accessed on: `{host}:{port}/apidocs`
### What problem does this PR solve?
Add test for CI
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix bugs in API
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Turn resource to plural form
### Type of change
- [x] Refactoring
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix issues in API
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix some issues in API
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Fix some issues in API
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Refactor Chat API
### Type of change
- [x] Refactoring
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Refactor Dataset API
### Type of change
- [x] Refactoring
---------
Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
SDK for session
#1102
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: Feiue <10215101452@stu.ecun.edu.cn>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
Complete DataSet SDK implementation
#1102
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: Feiue <10215101452@stu.ecun.edu.cn>
### What problem does this PR solve?
Complete implementation of dataset SDK.
#1102
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: Feiue <10215101452@stu.ecun.edu.cn>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
### What problem does this PR solve?
Added the ability to create and update dataset for SDK
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
---------
Co-authored-by: root <root@xwg>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>
