Add NorthstarProton

[italoghost]

Is your feature request related to a problem? Please describe.
The Northstar mod for TitanFall 2 recommends the use of the NorthstarProton.

Describe the solution you'd like
I would like to know if it is possible to add the repository to the "Compatibility Tool" list.

[DavidoTek]

I've created a downloader for NorthstarProton. I have to see whether I will include it in the official ProtonUp-Qt build.

For now you can add it manually:
If you use the Flatpak version of ProtonUp-Qt, you can download the downloader from here and copy the file to ~/.local/share/flatpak/app/net.davidotek.pupgui2/current/active/files/lib/python3.9/site-packages/pupgui2/resources/ctmods

[sonic2kk]

Is there any reason not to include this in official ProtonUp-Qt? Just curious to be honest, I don't know very much about the Proton build, and for what it does it seems like it's kept fairly up-to-date.

[DavidoTek]

I think we can add it. I think showing it only in advanced mode makes sense as it is a niche.

I will prepare a PR.