feat: only allow powershell core (#276)

# Pull Request

## Issue

https://github.com/Azure/ALZ-PowerShell-Module/issues/232

## Description

Add properties to the manifiest to block installation on `desktop`
PowerShell

## License

By submitting this pull request, I confirm that my contribution is made
under the terms of the projects associated license.

Author: jaredfholgate

src/ALZ/ALZ.psd1

@@ -32,8 +32,10 @@
     # Description of the functionality provided by this module
     Description       = 'Azure Landing Zones Powershell Module'
 
+    CompatiblePSEditions = 'Core'
+
     # Minimum version of the PowerShell engine required by this module
-    # PowerShellVersion = ''
+    PowerShellVersion = '7.4'
 
     # Name of the PowerShell host required by this module
     # PowerShellHostName = ''