Replace Factory with Swift Dependencies

[edwinveger]

Description

To smoothen the process of writing parallelizable unit tests with Swift Testing, replace Factory with Swift Dependencies by PointFree.

Checklist

• It is usable and accessible. It supports dark mode, as well as accessibility features such as VoiceOver, Dynamic Type.
• It is secure and respects user privacy. It maintains confidentiality, integrity and availability to an acceptable level.
• It is localised and internationalised. Any new strings have been added to POEditor.
• It has unit tests that cover all important (business) logic.
• Its performance is at an acceptable level.