Make score printout optional/configurable

[rallen10]

in v0.5.1, a score printout to terminal was added. This can be useful during competitions but noisy during development; should make this an optional flag that sets whether or not score is printed.

[rallen10]

https://github.com/mit-ll/spacegym-kspdg/blob/main/src/kspdg/base_envs.py#L421