Use inspectcode.sh on non-Windows platforms (#4313)

[1PetarVujakovic]

Fixes #4313

On Linux/macOS installations of ReSharper Command Line Tools the entry point is
"inspectcode.sh", but Cake currently attempts to execute "inspectcode.exe".

This change prefers inspectcode.sh on non-Windows platforms while keeping
".exe" as fallback to preserve compatibility with existing setups and tests.

[1PetarVujakovic]

@microsoft-github-policy-service agree

[devlead]

I'm wondering would the "correct" way be to implement support for the JetBrains.ReSharper.GlobalTools and support the jb inspectcode command mentioned in their docs.

Did a quick test, and it looks like it should work.

// Cake.Tool
#tool dotnet:?package=JetBrains.ReSharper.GlobalTools&version=2025.3.3

// Cake.Sdk
InstallTool("dotnet:?package=JetBrains.ReSharper.GlobalTools&version=2025.3.3");


var projectPath = GetFiles("./src/**/*.csproj")
                .FirstOrDefault() ?? throw new FileNotFoundException("Failed to find csproj");

Command(
    ["jb", "jb.exe"], // jb non-Windows, jb.exe Windows
    new ProcessArgumentBuilder()
        .Append("inspectcode")
        .AppendQuoted(projectPath.FullPath)
        .Append("--stdout")
);

Arguments might need to be prefixed inspectcode as jb can also launch cleanupcode.