Refactor File Structure and Update Script for Public Repo Compatibility

[DFRZ7]

• Renamed files to align with the expected structure of the public repository.
• Modified the deployment script to correspond with the new file naming conventions.
• Added a deployed policy set definition structure to provide a clear preview of how the initiative will appear in the Azure portal.
• Took the opportunity to remove PII of another policy set definition called multiple-billing-tags.
• These changes ensure better organization and compatibility with public repository standards, improving clarity and maintainability of the code.

[DFRZ7]

@microsoft-github-policy-service agree