Drupal 10: Adding Third Party Settings To Drupal Configuration Entities

Drupal's modular system allows for all kinds of additions to be added to your site through plugins, entities and configuration. Thanks to Drupal's modular configuration system you can also inject custom configuration into existing configuration entities. This allows you to extend the functionality of an existing entity and ensure that any customisation are saved in the system configuration. Any configuration entity can be augmented without changing the existing configuration schema of the entity, which might cause knock on effects to other modules.