Improve launch.json Documentation and Examples

[stonstad]

Despite my best efforts, I haven’t been able to find any examples showing how to configure exception break-mode behavior on a per-exception basis. The Debug Adapter Protocol spec describes this under ExceptionOptions (https://microsoft.github.io/debug-adapter-protocol/specification#_exceptionoptions
), but the section is difficult to interpret in practice.

VS Code doesn’t appear to use the following configuration. Without examples that demonstrate the expected behavior, I can only guess whether this is correct.

{
    "configurations": [
        {
            "name": "Launch App",
            "type": "dotnet",
            "request": "launch",
            "exceptionOptions": [
                {
                    "path": [
                        "System.OperationCanceledException"
                    ],
                    "breakMode": "never"
                }
            ]
        }
    ]
}