Migrate CDS Hooks + Rest modules to fastify-plugin architecture

[jdjkelly]

• Replace 'mount' interface/default export on CDS Hooks and Rest API modules with fastify-plugins
• Deprecate Config
• Deprecate Http module
• Rename several of the objects in the CDS Hooks namespace so they are prefixed with CDS
• Split fixture servers

This PR doesn't really change how the library is used, but it will require small example changes at the very top level where CDSHooks(config, http) is passed - that changes. And instead of using Http - you use Fastify directly (not a big difference). It's really minor for the end user.

Reviewers should complete this short tutorial with Fastify (https://www.fastify.io/docs/latest/Getting-Started/)

New CDS Example:

import {
  CDSHooks,
} from "../../src"

import patientViewExample from "../cds-hooks/patient-view";
import Http from "fastify";

const pluginConfig = {
  services: [
    patientViewExample,
  ],
  cors: true
}

export const http = Http();

http.register(CDSHooks, pluginConfig)

Merge checklist

• Add this to Handbook/onboarding https://www.fastify.io/docs/latest/Getting-Started/

[jdjkelly]

Oh it does one other very important thing which is a namespace change.

Rename several of the objects in the CDS Hooks namespace so they are prefixed with CDS

This will break examples - you have to change the import paths. I changed the CDS exports to namespace prefix them with CDS so that it matches what the SmartAuth module does

[mseckykoebel]

Looks good! I will change the examples to work with these new changes and make a new PR to fit it. I'll also read more into exactly what this does.