FIX: Ensure '$definition' is Hashtable in 'Format-PolicyDefinition'

[aschabus]

This pull request includes a significant change to the Format-PolicyDefinition function in the Scripts/Format-PolicyDefinition.ps1 file. The primary focus is on improving error handling and ensuring the JSON content is correctly parsed.

Key changes include:

• Added a try-catch block to handle exceptions when converting JSON content, ensuring any errors are caught and their messages are thrown. (Scripts/Format-PolicyDefinition.ps1)
• Restored the use of ConvertFrom-Json with -AsHashtable and -Depth 100 to handle the JSON conversion more robustly. (Scripts/Format-PolicyDefinition.ps1)table, we cannot remove keys one by one, causing the script to fail.

[Joshua-Donovan]

Reviewed code and the try catch addition does not appear to cause issues.

Downloaded the script and ran it several times with test policy definitions to validate it is working as expected. I had no unexpected errors in my testing.