Create 3.x branch to import core module

Problem/Motivation

As the core module is moving to contrib see 📌 [meta] Tasks to deprecate the Contact module Active

Proposed resolution

Grant access to andypost and larowlan to project to create subtree-split from core

Remaining tasks

- wait feedback
- do steps from https://www.drupal.org/about/core/policies/core-change-policies/how-to-d... →

User interface changes

API changes

Data model changes