Extension: CrudRestController

[bajtos]

Part of From model definition to REST API with no custom repository/controller classes #2036

A new extension (npm package living in loopback-next monorepo) providing CrudController class. See #740 for inspiration.

Acceptance criteria

• A new extension (let's call it @loopback/rest-crud) providing a base Controller class (let's call it CrudRestController) implementing typical CRUD operations using CrudRepository injected via constructor argument.

• The methods provided by the controller should be exactly the same as we are scaffolding via lb4 controller

• Minimal documentation - a "Basic Use" section in extension package's README is enough.

• Test coverage, including end-to-end tests (making HTTP requests to an app).

Out of scope

• Detailed documentation, will be done as part of From model definition to REST API with no custom repository/controller classes #2036
• Changes in CLI and Example apps

[bajtos]

Started the work here: https://github.com/strongloop/loopback-next/tree/feat/rest-crud

[bajtos]

Pull request in progress: #3582 Early feedback welcome!

[bajtos]

Closing as done.