#shell syntax support

[snikeguo]

Is your feature request related to a problem? Please describe.
When I call shell commands, I have to use the Process class, which is troublesome.

Process process = new Process();

process.StartInfo.FileName = ...
 process.StartInfo.Arguments = ...
process.OutputDataReceived+=...
process.Start();

Describe the solution you'd like

void Main()
{
   var o="app";

   //shell line:
   var return_code= #shell gcc -o main.c $"{o}.elf";
  if(return_code==0)
 {
    #shell   echo "build ok" //echo.exe output string
    Console.WriteLine("build ok");   //C# output string
 }
   
  var dir=Console.ReadLine();

   //shell block:
  #shell 
  {
       mkdir  $"{dir}"
       cd $"{dir}"
       mkdir video //create a sub dir
  }
}

Describe alternatives you've considered
currently, there is no other available solution

[snikeguo]

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