Feature: #99245 - Registered reactions in configuration module

See forge#99245


With forge#98373, the new reactions component has been introduced to TYPO3 Core. Since reactions allow to hook into the system, it's important for site administrators to have an overview of registered reactions.

Therefore, the configuration module does now list all registered reactions with their type identifier and corresponding configuration.


It's now possible for site administrators to get an overview of all registered reactions in the configuration module.