MaRDI Services as Liste (instead of Counter)

[physikerwelt]

Describe the issue On the start page one should show a list of services at the top of the page

• [ ] Create a List of services
• [ ] Design element
• [ ] Integrate it to the start page

[Daniel-Mietchen]

@timconrad Here is a page where we can draft such a list: https://portal.mardi4nfdi.de/wiki/Project:Services .