One-Time Run: Allow Steam Linux Runtime

[sonic2kk]

More work for #788.

Overview

Using the Steam Linux Runtime can improve compatibility with executables, particularly on Steam Deck with builds of Proton 8 and above. Though this is not always the case.

• In Directx 11/3d acceleration error on steam deck #772, the SLR fixed a Non-Steam game not working on SteamOS.
• In Vortex broken - but easier #806, the SLR seems to fix Vortex on SteamOS.
• In MO2 process stuck on exit #813, the SLR causes MO2 to crash.

In spite of this, Proton is intended to be used with the Steam Linux Runtime (though not fully intended to be used outside of Steam in general). Giving users the option to use the SLR is consistent with how Proton is supposed to be used, and allows users to toggle it based on their needs.

I have yet to see an instance personally where this is required for One-Time Run, but I have yet to run into a case where I required the Steam Linux Runtime on my PC. This option may be useful on Steam Deck for One-Time Run where applications may fail.

Implementation

We fetch the SLR to use using Pressure Vessel Funtime in setSLRReap, called from setNonGameSLRReap. We tell setNonGameSLRReap whether to get the native or Proton SLR based on ISWINDOWSEXE.

The SLR can be enabled from the GUI by checking the "Use Steam Linux Runtime" option. On the command line, it can be toggled with the --useslr flag. STL can then infer what SLR it needs to get. Example usage:

$ steamtinkerlaunch otr 1290000 --exe="/path/to/app.exe" --useslr

$ steamtinkerlaunch otr 1290000 --exe="/path/to/script.sh" --useslr

TODO

• Test for regression with "Save" option
• Update help screen to include --useslr option
• Update notifier to note when we are/aren't using the Steam Linux Runtime (will require a new language string)
• Update wiki
• Update langfiles

[sonic2kk]

Options same to all be saving correctly except for the Proton version, odd...

[sonic2kk]

Fixed the saving issue.

[sonic2kk]

Notifier added. Langfiles and wiki need updated now.

[sonic2kk]

Wiki updated: https://github.com/sonic2kk/steamtinkerlaunch/wiki/One-Time-Run

[sonic2kk]

Langfiles updated, this should be ready to merge

[sonic2kk]

Did one final round of testing (using Committee of Zero STEINS;GATE patch installer) and everything works as expected.