Add OpenHV.

[Mailaender]

Summary

This adds @OpenHV. This package is based on the one from @OpenRA with paths adjusted.

Test plan

Run openhv.

Checklist

• Package was built and tested against unstable
• This change could gainfully be listed in the weekly sync notes once merged
• I agree to license this contribution and all my previous contributions under the licensing terms in LICENSE.md and have the power and authority to grant those licenses.

[davidjharder]

Hi, welcome to the Solus repos! We ask that a Package Request issue be created before a new package is added. See here https://help.getsol.us/docs/packaging/procedures/request-a-package/#steps-to-request-a-new-package

For now I will convert this to a draft

[Mailaender]

#9878