Statistics (service functions, Ski statistics) - Waiting time at the chairlift

[Darshansinh28]

Description
This feature aims to provide users with information about the waiting time at chairlifts within OpenTracks. By calculating the duration spent waiting in line for chairlifts, users can better plan their skiing or snowboarding activities, optimizing their overall experience on the slopes.

Proposed Solution
Incorporate a feature in OpenTracks to track users' queue joining and boarding times at chairlifts by monitoring their proximity to the loading area. Calculate waiting time by subtracting boarding from queue joining time. Present this waiting time alongside other stats in the app interface. Ensure privacy and data security in the waiting time calculation.

Alternative Solution
An alternative approach could involve crowd-sourced data collection, where users manually input their waiting times at chairlifts. However, this method may be less accurate and rely heavily on user participation.

Additional context
This feature enhancement aims to enhance users' skiing or snowboarding experiences by providing them with valuable information about wait times at chairlifts. Integration with OSMDashboard groups may be beneficial for sharing this information with other users and facilitating better planning for group activities on the slopes.