Chairlift metrics (Group 7)

[Anthony8393]

Is your feature request related to a problem? Please describe.
Currently, open track does not include metrics related to chairlifts, such as the waiting time, the constant speed of the ride, and the elevation gain. To add getters setters methods for it considering how it is an important aspect of the statistic.
Describe the solution you'd like
I would like to add chairlift metrics to the "TrackStatistics" class in order to provide those feature. considering that it differs from a ski run, i believe it is worth implementing it.
Describe alternatives you've considered
Create a separate class for chairlift metrics, but that would be more complicated to try and merge the code together
Additional context
Part of group 7 requirements that have not been thought of.