[BUG] Does not work with Powershell 7

[boostchicken]

Describe the bug
You get an error form C:"Program" when you try to run in powershell, this is because we are using shell: true which is a bad practice, all its doing is injecting a variable before our command

To Reproduce
Steps to reproduce the behavior:

Expected behavior
It usually execs aws config se whatever value a fews times THose calls are not working on Powershell 7

Screenshots

Environment (please complete the following information):

• OS: Windows 11`
• CLI Version (saml-to --version): `` 2.1.1-0

Additional context
Considerd using setx instead of set for the command output, it works in bothb pwsh and cmd, however it saves to the registry and wont take effective till new shell is made

[boostchicken]

Implement my polyfill for set in pwsh for easy cmd and pwsh compat
#40 (comment)

if (test-path Alias:set) { Remove-Item -Path Alias:set }
function SET {
  [string] $var = $args
  if ($var -eq "")
  { Get-ChildItem -Path Env: }
  else {
    if ($var -match "^(\S*?)\s*=\s*(.*)$")
    { set-item -force -path env:$($matches[1]) -value $matches[2]; }
    else
    { write-error "ERROR Usage: VAR=VALUE" }
  }
}