message: add clang-format version to format-cxxcode
diff: +#! /usr/bin/env pwsh
  +
  [CmdletBinding()]
  $Root = Resolve-Path -LiteralPath "$PSScriptRoot/.."
  @@ -25,6 +27,9 @@ if ([String]::IsNullOrEmpty($clangFormat) -or -not (Test-Path $clangFormat))
  throw
  }
  +$clangFormatVersion = "$(& $clangFormat --version)".Trim()
  +"Using $clangFormatVersion located at $clangFormat" | Write-Host
  +
  $files = Get-ChildItem -Recurse -LiteralPath "$Root/src" -Filter '*.cpp'
  $files += Get-ChildItem -Recurse -LiteralPath "$Root/src" -Filter '*.c'
  $files += Get-ChildItem -Recurse -LiteralPath "$Root/include/vcpkg" -Filter '*.h'
  