Simplify the management of custom errors thrown in controllers and hooks

[LoicPoullain]

Issue

Resolves #638

Solution and steps

See commits.

New features

• The interface IAppController
• HttpResponseInternalServerError has two new optional properties: error and ctx. The renderError function assigns a value to them.

Breaking

• CreateAppOptions.methods removed. AppController.handleError can be used directly.
• req.foal.ctx does not exist anymore in post middleware.
• Hook post functions are still executed when an error is thrown in a hook or in the controller method.

Checklist

• Add/update/check docs (code comments and docs/ folder).
• Add/update/check tests.
• Update/check the cli generators.