Make CORS a core plugin

• Used appropriate template for the issue type
• Searched both open and closed issues for duplicates of this issue
• Title adequately and concisely reflects the feature or the bug

Feature Request

Use Case

Why do you want this?

There is a restify-cors-middleware package (which is recommended by restify documentation), but unfortunately it has been abandoned for the last 2 years. Considering that the CORS is an important aspect of today's web, I think it would be justified to make it a core plugin. For comparison, Fastify has it as a core plugin.

Example API

This should include code snippets and documentation for the proposed feature

Please see https://github.com/Tabcorp/restify-cors-middleware#readme

Are you willing and able to implement this?

"Yes" or, if "no", what can current contributors do to help you create a PR?

Unfortunately not at this point.

Start with the restify-cors-middleware README linked in the issue and compare its API with the current restify documentation. Then identify how existing core plugins are organized and determine the required implementation, tests, and documentation; done means CORS is available as a maintained core plugin with its behavior and API documented.