[ESD-13941] Implement a DOMPurify hook to enable target attributes on links

[stevehobbsdev]

Changes

This PR adds a hook for DOMPurify that allows elements that are sanitized
using DOMPurify.sanitize to have target="_blank" attributes, while also
adding rel="noopener noreferrer" to the same element to mitigate against
Tab Nabbing.

The implementation provided in this example serves our purposes, and has been integrated vertabim.

References

Fixes ESD-13941

Testing

• This change adds unit test coverage
• This change adds integration test coverage
• This change has been tested on the latest version of the platform/language

Checklist

• I have read the Auth0 general contribution guidelines
• I have read the Auth0 Code of Conduct
• All code quality tools/guidelines have been run/followed
• All relevant assets have been compiled