Dependency on host OS does not support remoting

[rhubarb-geek-nz]

Summary of the new feature / enhancement

In VT100EscapeSequences.cs is the following code

        // MacOS terminal app does not support extended colors for VT100, so we special case for it.
        Code = RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? CodeMacOS : isDarkTheme ? CodeDark : CodeLight;

This would not work if the user is using MacOS to ssh to another platform and running PowerShell there (eg a linux host in the cloud), or using another platform and using SSH to talk to a MacOS machine (eg a build server).

Proposed technical implementation details (optional)

No response