### What problem does this PR solve?
feat: Use Tree to display the knowledge base list on the search page
#2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Cover the entire search page with a background image #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: The search box is displayed globally when the page is loaded for
the first time #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Fetch mind map in search page #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: send question with retrieval api #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: Add sidebar to SearchPage #2247
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
