Add stories moderation

[keyansheng]

Description

source-academy/stories-backend#120

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [x] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update
• [ ] Code quality improvements

How to test

Checklist

• [ ] I have tested this code
• [ ] I have updated the documentation