Consider deprecating old hooks API

**Feature request**
It would be great to have import for core.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_import` with default `false`.

Start by locating the old hooks API and the configuration handling for the proposed `enable_import` option. The issue names no files or tests, so first clarify whether the work is deprecating hooks, adding core import support, or both. Done should include an agreed scope, default behavior, and verification for production deployments.

Written by the indexing model from the issue text.