TypeScript: Profile as an Adapter

[ryukzak]

Feature Description
OOP-style support for profiles for TypeScript.

Problem Statement
Current support for profiles in TypeScript is very limited:

• profile types which reshape the original resource
• attach/extract function work
• slices and extensions not supported

Also, this approach looks too functional for the TypeScript environment.

Describe the solution you'd like
What we want to try in src/api/writer-generator/typescript.ts:

// templating (constants)
// extensions
// slices

const pt = Patient(...);
const ptpr = UsCorePatient(pt);
ptpr.race = race;
ptpr.setRace('white');

client.post(pt)
client.post(ptpr.resource)
client.post(ptpr.getResource)

• Editing profiles causes updating the original resource.

The great starting point is to extend the design doc: docs/design/profiles.md, because the current notes look too rough.

Additional context

• First attempt analysis: docs/design/profiles.md based on hapi.