Function tryRun
Runs a command, through the system's command shell interpreter, in typical shell-script style: Synchronously, with the command's stdout/in/err automatically forwarded through your program's stdout/in/err.
Optionally takes a working directory to run the command from.
The command is echoed if scriptlikeEcho is true.
Returns
The error level the process exited with. Or -1 upon failure to start the process.
Example
Args cmd;
cmd ~= Path("some tool");
cmd ~= "-o";
cmd ~= Path(`dir/out file.txt`);
cmd ~= ["--abc", "--def", "-g"];
auto errLevel = Path("some working dir") .run(cmd .data);