Add run and crouch colors for the player's @ symbol

[dunstad]

Summary

SUMMARY: Interface "Add run and crouch colors for the player's symbol in ASCII"

Purpose of change

This makes it easier to tell when the zombies are going to eat you because you're crouching away right in front of them, or to notice you're still running when you're safe.

Describe the solution

When running, the normally white @ is yellow. When crouching, it's light gray.

Describe alternatives you've considered

I wouldn't mind if the light gray for crouching was more noticeable, but dark gray is already used for invisibility it looks like.

Additional context