Add Support For Extensibility as Custom Provider in BrandingManager

[tanya732]

Changes

Added support for extensibility as a custom provider in BrandingManager.

New Methods Added:
ListPhoneProviders
ReadPhoneProvider
CreatePhoneProvider
DeletePhoneProvider
UpdatePhoneProvider

References

List Phone Providers
Create Phone Provider
Get Phone Provider
Delete Phone Provider
Update Phone Provider

Testing

Verified new API endpoints by making requests to Auth0 Management API.
Ensured coverage with unit tests for new methods.

Manual Testing guide

1. Securely store your Client ID, Client Secret, and Management API token.
2. Install the SDK: npm install auth0

var management = new ManagementClient({
domain: '{YOUR_TENANT_AND REGION}.auth0.com',
clientId: '{YOUR_CLIENT_ID}',
clientSecret: '{YOUR_CLIENT_SECRET}',
});

const phoneProviders = await management.getAllPhoneProviders();
const phoneProvider = await management.getPhoneProvider('{YOUR_PROVIDER_ID');

Checklist

All new/changed/fixed functionality is covered by tests (or N/A)
I have added documentation for all new/changed functionality (or N/A)