sane-backends,hplip,libcups: looking for maintainer

I recently lost my printer used for sane-backends and hplip tests. The new one uses proprietary HP driver not compiled for anything but arm/x86.

https://github.com/openwrt/packages/issues/14830
https://forum.openwrt.org/t/sane-issue-on-hp-laserjet-m1132/57698
https://developers.hp.com/printos/forum/proprietary-drivers-hplip-plugins-more-archs?language=ja

Even if HP provided the driver for mips and others, I'm not sure if it will work with OpenWrt nor if the router HW could withstand the driver needs.

I can continue maintaining the package but I'll only be able to test with fake printers (sane-test). However, most issues are with USB/hplip integration. It would be better to someone with real use to take the task.
As my new device is a network printer, I'm not going to use sane,hplip in OpenWrt anymore.

libcups is just a stripped cups used as hplip build requirements (until someone maintains the full cups for OpenWrt).

I'll ping previous committers @neheb @syssi

Review the sane-backends, hplip, and libcups package definitions alongside the linked OpenWrt issue, forum thread, and HP discussion. The issue does not define a specific change; completion would require an interested maintainer to take responsibility and establish how these packages can be tested and maintained.