evaluation

Description

Currently, when a challenge link from EvalAI is shared users see a generic view of EvalAI homepage. We want the details specific to a challenge to be shown when a link is shared. Here's how it looks currently

Expected behavior:

T

I noticed it is quite tricky at the moment to generate a benchmark with an unbalanced number of examples for each step.
It would be nice to have an option in ni_scenario, nc_scenario and similar to set the number of examples for each step.