🐛 Implement New-EntraServicePrincipalKeyCredential cmdlet

[DButoyez]

We've identified an issue with the New-EntraServicePrincipalKeyCredential command in the Entra PowerShell module. While the documentation exists, the command itself does not seem to be implemented.

Here are the details:

Documentation Link: https://github.com/microsoftgraph/entra-powershell/blob/main/module/docs/entra-powershell-v1.0/Applications/New-EntraServicePrincipalKeyCredential.md

Issue: The command New-EntraServicePrincipalKeyCredential is not recognized as a valid cmdlet, function, script file, or executable program in the Entra module version 1.0.5. However, the Get-EntraServicePrincipalKeyCredential command works as expected.

Steps to reproduce:

• Install the Entra PowerShell Module.

• Run the command New-EntraServicePrincipalKeyCredential in PowerShell.