(feature) Flag for verbosity of output

[skylarmacdonald]

from the original...

one issue here is that some scripts (f.e. "ok brew" when installing) NEED to send their output because they also need input. Perhaps the types will have to respect the verbosity flag and use their own judgement.

[skylarmacdonald]

This has been implemented in core on the feat/aggregate-error-output branch almost by accident of implementing #12.

Types will need to check the BORK_QUIET variable and do whatever they need to do to be quiet — I'm wary of sending all of stdout to /dev/null, for example.