Add a little onboarding for the Folksonomy Engine

[teolemon]

Problem

These properties are created and filed by users for any kind of usages. Feel free to add your own. The properties and values you create must be factual. You can dive into the list of properties already used by the community or explore the properties' documentation and its search engine.

Be aware the data model might be modified. Use at your own risk.

Part of

• 🎯 What can I work on ? #525