Feature : add arrow buttons at the bottom and top of outings and routes documents to easier navigation

**Community discussion about this feature (mandatory)**
[[Link to where this feature has been validated](https://forum.camptocamp.org/t/sorties-ajout-dun-classement-par-appreciation/321138/12?u=anakreenskyrider)](https://forum.camptocamp.org/t/sorties-ajout-dun-classement-par-appreciation/321138/12)

**Is your feature request related to a problem? Please describe.**
Easier the navigation through differents documents linked to the same route (for outings) or summit (for routes)

**Describe the solution you'd like**
add arrow buttons at the bottom and top of outings and routes documents to easier navigation in order to go easily to the next outing linked to a route or the next route linked to a summit

**Describe alternatives you've considered**
none

**Additional context**
none