* feat: Add file content preview functionality
- Implemented a new API endpoint for previewing file content.
- Added PreviewContent method in BaseApi to handle requests.
- Introduced GetPreviewContent method in FileService to retrieve file previews.
- Updated frontend to include a TextPreview component for displaying file previews.
- Added localization support for preview-related messages in multiple languages.
- Enhanced file management view to support previewing large files.
* feat: Update file preview functionality and interface
- Added PreviewContentReq interface to define request parameters for file preview.
- Updated getPreviewContent function to use the new PreviewContentReq type.
- Modified text-preview component to align with updated API, removing unnecessary parameters.
* perf: use gzipped data for improved load speed in big files
* perf: switch to gzipped response for GetFileTree to enhance performance
* perf: switch to gzipped response for SearchApp to improve performance
* perf: update file size conditions for gzipped response to enhance performance
