Add classical ski tracker

Hello,

CARV offers sophisticated tracking of movements and riding technique, but it lacks the classical ski statistics. For things like the number of runs, time spent on lifts, distance skied, rest time, and similar metrics, I still need to use a separate app such as Slopes, Skill, Ski Tracker, or others.

What makes this even more noticeable is that CARV already collects all the necessary data — it simply needs to add the corresponding statistical views.

Common ski statistics that would be useful:

— Per run
— Per day
— Per trip
— Per season

Examples of metrics:

- Time for each run
- Time for each lift
- Time spent resting
- Maximum and average speed
- Distance skied
- Number of runs
- Number of lifts