### What problem does this PR solve?
Feat: Refactoring the documentation page using shadcn. #10427
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
Fix: Optimized the table of contents style and homepage card layout
#3221
- Added background color, text color, and shadow styles to the Markdown
table of contents
- Optimized the date display style in the HomeCard component to prevent
overflow
- Standardized the translation of "dataset" to "knowledge base" to
improve terminology consistency
### Type of change
- [x] Bug Fix (non-breaking change which fixes an issue)
### What problem does this PR solve?
Feat: Move langfuse configuration to api page #6155
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
the api doc is too long, add a toc might be better
### Type of change
- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):
