Simple human readable error messages

[nick-roux]

Describe the bug
Error messages are not human readable

To Reproduce
Steps to reproduce the behavior:

1. Set options to scan from ADF
2. Remove documents from ADF
3. Click Scan

What actually happens
An overly complex message that is hard to interpret for the average user

{"message":"/usr/bin/scanimage -d escl:https://192.168.88.175:443 --source ADF --mode Gray --resolution 150 -l 0 -t 0 -x 210 -y 297 --format tiff --batch='data/temp/~tmp-scan-1-%04d.tif' exited with code: 7, stderr: scanimage: rounded value of resolution from 150 to 150\nscanimage: rounded value of tl-x from 0 to 0\nscanimage: rounded value of tl-y from 0 to 0\nscanimage: rounded value of br-x from 210 to 210\nscanimage: rounded value of br-y from 297 to 297\nScanning infinity pages, incrementing by 1, numbering from 1\nScanning page 1\nscanimage: sane_start: Document feeder out of documents\nBatch terminated, 0 pages scanned\n","code":-1}

Expected behavior
A clear and concise error informing one that there is no paper in the document feeder, without all the other clutter in the message

Screenshots

Client (please complete the following information):

• Browser: ALL

Server (please complete the following information):

• OS: podman on Debian 12.13
• image: sbs20/scanservjs:latest