Composer (Dev): Add `captainhook/captainhook` and `captainhook/plugin-composer` for ILIAS 12

[fhelfer]

This PR suggests adding captainhook/captainhook (v. 5.27) and captainhook/plugin-composer (v. 5.3) as composer dependencies.

General Information:

• [X] this dependency was already used in ILIAS.
• [X] License: MIT

Usage:

• Executed during multiple Composer and Git actions (depending on our shared and possible individual configuration files)

Wrapped By:

• Not applicable

Reasoning:

• CaptainHook is an easy-to-use and very flexible Git hook library for PHP developers. It enables us to configure our Git hook actions in a simple (and shared) JSON file.
• CaptainHook helps us to enforce PHP code style and language file structure policies. Generally speaking, it allows the execution of any script for arbitrary actions, so developers can easily extend the shared configuration by e.g. executing unit tests before a git push, or checking commit messages against a configured ruleset.

Maintenance:

• CaptainHook is well maintained (see: https://github.com/captainhookphp/captainhook/commits/main) and widely used in the PHP community.
• The risk of relying on this library is small. It is a development dependency all mandatory code policies are enforced again by our GitHub CI pipeline on the Git remote server.

Links:

• Packagist: https://packagist.org/packages/captainhook/captainhook / https://packagist.org/packages/captainhook/plugin-composer
• GitHub: https://github.com/captainhookphp/captainhook / https://github.com/captainhookphp/plugin-composer
• Documentation: https://captainhookphp.github.io/captainhook/

[matthiaskunkel]

Jour Fixe, 08 DEC 2025: Dependency is accepted for ILIAS 12.