Add Angular support for Celsius and Fahrenheit number format units

[m-akinc]

Pull Request

🤨 Rationale

Part of #2016

👩‍💻 Implementation

Added directives/modules for elements, exported unit scales from pipes module, added tests, and updated Storybook usage doc.

🧪 Testing

Tests added.

✅ Checklist

• [x] I have updated the project documentation to reflect my changes or determined no changes are needed.

[m-akinc]

@atmgrifter00 Would you please buddy/first-review this PR for me?