CaptureListDecision runs a for loop and continuously asks the user for a specific input (currently only `CapturePChainAddress` and `CaptureAddress` is supported) until the user cancels or chooses `Done`.

check subnet authorization criteria: - [subnetAuthKeys] satisfy subnet's [threshold] - [subnetAuthKeys] is a subset of subnet's [controlKeys].

get subnet authorization keys from the user, as a subset of the subnet's [controlKeys] with a len equal to the subnet's [threshold].

NewProcessChecker creates a new process checker which can respond if the server is running.