Fix Depot Downloader not working on Linux

[Insprill]

Scope

Fixes the Depot Downloader not functioning on Linux.
This should be double-checked to ensure Windows compatibility is not affected.

Implementation

Instead of directly invoking the exe, it will run the DLL through dotnet when Linux is detected.

How to Test

• Try downloading a version of Beat Saber on Linux and Windows.

Emoji Guide

For reviewers: Emojis can be added to comments to call out blocking versus non-blocking feedback.

E.g: Praise, minor suggestions, or clarifying questions that don’t block merging the PR.

🟢 Nice refactor!

🟡 Why was the default value removed?

E.g: Blocking feedback must be addressed before merging.

🔴 This change will break something important

Blocking	🔴 ❌ 🚨	RED
Non-blocking	🟡 💡 🤔 💭	Yellow, thinking, etc
Praise	🟢 💚 😍 👍 🙌	Green, hearts, positive emojis, etc

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[Insprill]

I don't believe the security hotspot SonarCloud flagged is relevant here, since dotnet may be located differently depending on the user's system, but if there's a different way to do it please let me know.

[Zagrios]

All good 👍 thanks for that 😉