Create a Nitric CDK for deployment and runtime development for custom providers

[HomelessDinosaur]

In the future, it may be valuable to release developer resources that make writing the custom providers easier for the languages that Nitric supports. This would remove the need for this boilerplate so that you can focus on writing your code. This may look like the following:

import { deploy } from '@nitric/cdk';

deploy.up(async ({ spec }) => {
  // deploy the stack
});

deploy.down(async ({ spec }) => {
  // tear down the stack
});

This would also include the utilities to make it easier to write runtime plugins in your own language as well