### What problem does this PR solve?
#345
feat: translate FileManager
feat: batch delete files from the file table in the knowledge base
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
### What problem does this PR solve?
feat: create folder
feat: ensure that all files in the current folder can be correctly
requested after renaming the folder
#345
### Type of change
- [x] New Feature (non-breaking change which adds functionality)
