Enhance file type restriction error messages to include the names of the rejected files, providing users with clearer feedback during bulk uploads.
### Initial checklist - [x] I understand this is a feature request and questions should be posted in the [Community Forum](https://community.transloadit.com/) - [x] I searched [issues](https://github.com/transloadit/uppy/issues?q=is%3Aissue) and couldn’t find anything (or linked relevant results below) ### Problem When uploading multiple files, users have no clear indication of which file(s) caused the error. This makes troubleshooting frustrating, especially in bulk upload scenarios. ### Solution Update the error message to include the rejected file name(s). For example: `'document.exe' is not supported. You can only upload: .png, .jpg` This makes it much easier for users to identify and correct problematic files during batch uploads. ### Alternatives None.