hidapi: netbsd uhid native backend in mainstream

[sezero]

libusb/hidapi@c19ae12 (netbsd-only, was originally discussed at libusb/hidapi#612)

@slouken: Are we interested?

[slouken]

NetBSD isn't a primary platform for SDL, @madebr, what do you think?

[madebr]

ci wise, it's not hard to add netbsd.
cmake wise, if it can treat freebsd and netbsd similarly it should not be too hard.
c wise, that's up to you :)

[slouken]

Sure, there's no reason not to.

[madebr]

@sezero

Do you know how to install packages on netbsd?
I followed these instructions, but get errors.
https://github.com/madebr/SDL/actions/runs/6836739399/job/18591993484#step:3:140

It runs

export PATH="/usr/pkg/sbin:/usr/pkg/bin:$PATH";export PKG_PATH="https://cdn.netbsd.org/pub/pkgsrc/packages/$(uname)/$(uname -m)/$(uname -r)/All/";echo $PKG_PATH;sudo pkg_add -v pkg

with on stdout:

https://cdn.netbsd.org/pub/pkgsrc/packages/NetBSD/amd64/9.3/All/
pkg_add: no pkg found for 'pkg', sorry.
pkg_add: 1 package addition failed

[sezero]

Do you know how to install packages on netbsd?

Nope, sorry

[sezero]

Created initial PR as #8536 -- feel free to push to my branch.