Add sabre/dav as composer Dependency for ILIAS 12

[chfsx]

Assessment:
sabre/dav is a robust PHP library for implementing WebDAV, CalDAV, and CardDAV protocols, offering a flexible and scalable solution for building file sharing, calendar, and contact management services.

General Information:

• Name of the dependency: sabre/dav
• Version: 4.6.0
• this dependency was already used in ILIAS.
• the dependency's license is compatible with ILIAS' license

Type of dependency:

• composer
• npm

Usage:

• \ILIAS\WebDAV

Reasoning:
The library provides a fully standards-compliant implementation of WebDAV and related protocols, making it ideal for ILIAS projects that require collaborative features like file synchronization, calendar events, or contact management, with a high degree of customization and extensibility.

Maintenance:
Last update of the Library: 2023-12-11, PHP Version: ^7.1.0 || ^8.0

Links:

• Packagist: https://packagist.org/packages/sabre/dav
• GitHub: https://github.com/sabre-io/dav.git
• Documentation: http://sabre.io/

Alternatives:
Alternatives like baikal are simpler and more lightweight but lack the flexibility and extensibility of sabre/dav, while icewind/smb or native WebDAV solutions would require more configuration and don’t provide the same level of comprehensive protocol support, making sabre/dav the best choice for ILIAS’s feature needs.

[matthiaskunkel]

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

[lscharmer]

Merged with PR: #11255