Add mode for run telemetry

[vabold]

Fun exercise left for first-time contributors. I ask that long-time contributors keep solutions to themselves - this can be a fun way for new people to get into the physics engine and figure out what really happens per frame.

The base game already has existing telemetry in the form of stats structs found in KartSettings. For example, in Grand Prix, the game tracks the miniturbo count, whether or not a start boost was applied, how many frames were spent in offroad, etc. Kinoko can be leveraged to track way more interesting data - how many frames were wasted in a full MT charge? What's the set of unique triangles and objects the run collided with? How many frames of trick airtime are there?

[malleoz]

Can you clarify how this would be different from a generic "Frame Step Mode"? Is the idea that Kinoko itself would keep track of this telemetry data rather than the user defining their own code?