There's a closed pull request on the void-packages repository

New package libXnvctrl-devel and a change in MangoHud to depend on it, so that Nvidia cards will be detected on MangoHud
https://github.com/void-linux/void-packages/pull/44028

Description:
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#### Testing the changes
- I tested the changes in this PR: **YES**


#### New package
- This new package conforms to the [package requirements](https://github.com/void-linux/void-packages/blob/master/CONTRIBUTING.md#package-requirements): **YES**


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#### Local build testing
- I built this PR locally for my native architecture, (x86_64)
- I built this PR locally for these architectures (if supported. mark crossbuilds): n/a


The default MangoHud package in the repos is a little broken due to the lack of Nvidia detection, only working on open source GPUs. As a result, I looked further and realized it was due to a lack of libraries, and with some help I realized these libs were missing on the original .run installer that is the basis of the Nvidia package. So I looked at how Arch did things and made a package that takes the source for the nvidia-settings tool, compiles it, and then takes its library dev files for GPU detection and makes them into a package. I then updated MangoHud to depend on the package, that way it'll support Nvidia cards finally and people won't need to install a third party version from Flatpak or their repo.