[WIP] Revisiting structure part 1

| Q   | A
| --- | ---
| Doc fix? | yes
| New docs? | no
| Applies to | all
| Fixed tickets | partly #523

During this Community Hack Day, I'll try to work on the revisited doc structure.
i think having this at the top makes it more likely for people to notice it. when its at the end, they already tried to understand documentation for things they did not need, no?