Add Steam launch options

[hazre]

Adds support for Steam launch options, allowing users to select different game modes defined by developers (VR, dedicated server, safe mode, etc.) when launching through Steam.

• Dialog showing available launch options before starting a game
• Toggle in Settings to enable/disable this feature (under Steam launch mode)
• Support for all Steam launch option types (VR modes, dedicated servers, editors, etc.)

Implementation Notes

• Uses VDF parser from Steam-Art-Manager to read Steam's binary
  appinfo.vdf file
  • Existing VDF libraries only support text format, not the binary format used by Steam's app cache or are not updated to support steam's latest magic header for binary vdf files.
• Launch option display strings match Steam client's formatting
• I didn't include Steam's "always use this option" functionality for simplicity reasons. So users have to select their choice each time if enabled.

[Kesomannen]

I don't really like dumping the whole vdf parser into the code like this. Are you sure there isn't a library to do it? Otherwise I would even prefer if one of use published it as a crate and have Gale use that.

[hazre]

I've looked around but they all seem to be missing the binary parsing or they're outdated but this was the only rust implementation that actually worked. I've made a issue about the crate thing already Tormak9970/Steam-Art-Manager#261

[hazre]

Managed to get the vdf parser published as a crate, so I updated the code and replaced the VDF parser with new-vdf-parser crate 😄

[hazre]

@Kesomannen is there any blockers on this?

[Kesomannen]

No, I just haven't been working on gale lately. I tested it out and made some tweaks!

Also, any ideas why PEAK shows a duplicated option?

And I feel like the option should be on by default, no?

[hazre]

Also, any ideas why PEAK shows a duplicated option?

Looks like we need to filter by beta branches, steam lumps everything together. I need to see where steam stores launch options user configs.

And I feel like the option should be on by default, no?

I was just trying to respect the existing config behavior but yeah it should probably be default.

[hazre]

For now I just filtered out the beta branch options, since I can't seem to figure out where steam stores beta game preferences.

Also I almost completely forgot but also need to filter out options specific for linux, windows and proton. I think I got something but I need to actually test it on a linux machine.

[Kesomannen]

Were you gonna test it more or would you say this is ready to merge?

[hazre]

I haven't had a chance to test the local changes on linux but I can push it. Also probably need to merge in upstream and move the strings to localization stuff.

[zandra20101-ui]

Can I play this game