Change to convert the leading tilde to home path on Windows

[itok01]

This PR Changes to convert the leading tilde to home path on Windows command line.
Until now, VSCode was inconvenient because it didn't recognize the leading tilde as home directory.

e.g.:

Then VSCode will open the file C:\Users\<USER>\a.txt.

code ~\a.txt

Then VSCode will open the directory C:\Users\<USER>\.

code ~

Then VSCode will open the directory .\~a.txt.

code ~a.txt

[itok01]

#43560

[sbatten]

the tilde expansion is a property of the shell and Powershell 7 supports this https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows?view=powershell-7.2 ... IMO this isn't really the responsibility of the editor itself.