Allow navigation between talk details

[fcamblor]

When opening talk details, we should be able to jump to other talk details :

• From same timeslot + same format
• From same timeslot + different format (when multiple formats are available)
• To different timeslot, trying to keep same format

Not sure if we should provide as much buttons as the number of possibilities above Not sure where to put these navigation buttons either

Navigation using swipe right/left would be a plus, I guess (not sure if we can, but if we could use 2 fingers swipe, we might distinguish jump to same timeslot vs next/previous timeslot by using either single finger or double finger swipes

[robinlopez]

@fcamblor I've pushed ahead with the integration of a navigation bar (from talk to talk + a system for changing slots). I'll let you plug things in ;)

Uploading Oct-06-2023 17-09-22.mp4…