added Windows/Linux support, IWAD UX improvements, and safer delete flow for WADs.

[magnetProgramming]

Hey I thought this project was pretty cool! but I am on Windows so I decided to add support for Linux / Windows. I wasn't able to test the Linux build. If someone can that would be cool otherwise I will in the next couple days. I also wasn't able to test the GOG innoextract on windows because I have the steam release. But I did implement it to the best of my ability.

I also cleaned up a few usability issues in Settings:

Added an IWAD Refresh button so new files show up without restarting
Added Open IWAD Folder so it’s faster to drop IWAD files in the directory
Added a confirmation dialog before deleting downloaded WAD files

I updated path handling, engine lookup, running-process checks, and Tauri config so local folders can be opened correctly on each OS.

Not too experienced with doom or doom modding but recently wanted to get into it.

[stared]

Thanks @magnetProgramming - and please excuse me for making you wait!

I made some changes for code consistency - let me know if it works for you; is so, happy to accept this PR.

[magnetProgramming]

Hey, this looks good! One issue I ran into was that the restricted shell:open scope in tauri.conf.json was causing the "Open IWAD Folder" button to fail. I updated the regex to allow full paths while still keeping some level of restriction. Let me know if this works for you.

[magnetProgramming]

I noticed in the compiled release that when clicking Play, there is about a 14-second delay before the engine actually launches. I looked into it and it seems to be caused by the validation check in validateDownload(). This also leads to some frontend freezing and UI issues.

Commenting out the validation call for already downloaded files made the engine launch instantly with no freezing. I am not sure what the best approach is here though. Should we skip validation for files that are already downloaded, or just loosen it? Either way, the 14-second delay is pretty painful 😂

if (await exists(path)) {
  // File exists - validate it before marking as downloaded
//  await validateDownload(path, filename); commenting this out removes 14 second delay + freezing issues
  if (!isDownloaded(wad.slug)) {
    const fileStat = await stat(path);
    downloads.value.downloads[wad.slug] = { filename, downloadedAt: new Date().toISOString(), size: fileStat.size };
    await saveState();
  }
  return path;
}

[stared]

@magnetProgramming One thing at a time. This performance once - just add it as an issue, I am in the process of rewriting some things, so to avoid needless and time-consuming operations.

Add you 6a582f0 - sadly would allow arbitrary command execution. I changed it to be more restrictive.

[stared]

Merged - than you for your contribution, @magnetProgramming