[Modules] Added Public DNS Zone Module

[ahmadabdalla]

Closes #3070

• Includes all child resource types
• Updated RBAC nested assignments
• Used the prefix 'Public' in the Workflows, pipelines, and documentation name to distinct this module from the 'Private DNS Zone' version

Pipeline references

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Pipeline

Type of Change

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• New feature (non-breaking change which adds functionality)

Checklist

• I'm sure there are no other open Pull Requests for the same update/change
• My corresponding pipelines / checks run clean and green without any errors or warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (readme)
• I did format my code