Fix information display (right frontend panel)

[matthiaskoenig]

• [x] Information on the right side must be displayed consistently; use same component for all information. Probably the best to build a style and then use v-card-title and v-card-text consistently
• [x] Display detail information for group, individual, intervention, ...
  • [x] info node detail
  • [x] study detail
  • [x] group detail
  • [x] individual detail
  • [x] intervention detail
  • [ ] output detail
  • [ ] timecourse detail
  • [ ] scatter detail
• [x] make links work to detail views
• [x] dark schema