Updated echoargs.ps1

to include [System.Environment]::CommandLine and more consistent output
Added the CMD and PS1 scripts to the solution
Updated echoargs.cmd

to include %CmdCmdLine% and have more consistent output
Updated EchoArgsCS with more consistent output

and a commented out implementation of calling CommandLineToArgvW()
Updated EchoArgsCPP with more consistent output

and include GetCommandLineW() and CommandLineToArgvW() which parses with
different logic than argv