- Added endpoints for uploading BOM data from Excel and downloading BOM data in Excel format.
- Developed the `createBomFromExcel` function to handle Excel uploads, including validation and error handling.
- Implemented the `downloadBomExcelData` function to retrieve BOM data for Excel downloads.
- Created a new `BomExcelUploadModal` component for the frontend to facilitate Excel file uploads.
- Updated BOM routes to include new Excel upload and download routes, enhancing BOM management capabilities.
