enable NetBSD Continuous Integration

[andrewrk]

Zig currently uses sr.ht for FreeBSD CI. Although it does not have Tier 1 Support yet (#1759) at least the behavior tests are run in various configurations. See the file .builds/freebsd.yml.

sr.ht also has support for NetBSD and so it would be pretty straightforward to get some level of CI testing for NetBSD going. It seems sr.ht dropped support

[euantorano]

Related to #2978, what's the current thinking on handling targets not supported by existing CI services (eg: NetBSD, OpenBSD, ARM, etc.)?

GitHub Actions look like they could actually be a good way forward as you can run an agent on your own server - whether the agent will support NetBSD/OpenBSD/other platforms is a mystery right now though...

Obviously actions would need configuring, but that's no big deal really.

I know that Nim got some Digital Ocean credit given to them as an open source project to let them host their site and such - possibly worth looking into that kind of thing if we need to start running agents.

[daurnimator]

@cryo

[krytarowski]

Probably the best approach is to add NetBSD to sr.ht, for general benefit.

[euantorano]

Probably the best approach is to add NetBSD to sr.ht, for general benefit.

Not sure if you've already seen the call for assistance here: https://lists.sr.ht/~sircmpwn/sr.ht-dev/%3CBXW5IXAF5BP2.2BHCF8T5SOU75%40homura%3E