UR-289 Address field implementation

[prunepal3339]

All Submissions:

• Have you followed the User Registration Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

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Changes proposed in this Pull Request:

This PR introduces the Address Field implementation for the User Registration (URM) plugin.
The Address Field allows site admins to collect detailed location information from users via registration forms. This includes settings like country, state, city, postal code, and custom labels or required flags.

This feature includes:

• Admin UI integration for adding and configuring the address field via the form builder.
• Frontend display and submission handling for address field inputs.
• Edit profile support to allow users to view and update their address information.

Closes #.

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How to test the changes in this Pull Request:

1. Go to URM > Forms, create or edit a form and add the "Address" field from the form builder.
2. Configure the field settings (enable/disable country, state, postal, etc.).
3. View the form on the frontend and submit test data with the address fields.
4. Go to My Account > Edit Profile and confirm address data is editable and persists after update.
5. Check form entries in the admin panel and ensure address data is saved correctly.

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Types of changes:

• Bug fix (non-breaking change which fixes an issue)
• Enhancement (modification of the currently available functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

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Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you successfully ran tests with your changes locally?
• Have you updated the documentation accordingly?

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Changelog entry

Added support for an Address Field in URM forms.