Fix worn wrapper warmth function not checking for bp coverage

[Crupette]

Summary

None

Purpose of change

Fixes #55972

Describe the solution

Before, the warmth function introduced by the new wrapper did not check for coverage when iterating through bp's.
This adds a check for clothing.covers(bp)

Describe alternatives you've considered

Let the player boil

Testing

Create a naked character, noting temperature
Give the character a pair of wool socks
Check if temperature is only changed for the feet

Additional context