ScubaConfig initializer exception for Invoke-SCuBA and Initialize-SCuBA

[buidav]

🐛 Summary

When running on systems (in this cause a Debian distro) where $env:USERPROFILE is null this cryptic exception pops us.

`OperationStopped`: The type initalizer for `ScubaConfig` threw an exception`

Had to run this below to see this source error in ScubaConfig.psm1.

try {
       Initialize-SCuBA
}
catch {
   $_.Exception.InnerExecption
} 

Fix is to add error handling to the DefaultOPAPath assignment line.

Original line.

The fix.

To reproduce

Run Initialize-SCuBA or Invoke-SCuBA on Linux and/or Macs with PowerShell 7.

Expected behavior

For ScubaGear not to throw a cryptic exception on initially running.