Add kickoff, complete and describe_collect on StandardDetector

[rosesyrett]

This requires moving the existing logic of kickoff/complete and describe_collect from the flyer to the StandardDetector.

This is part of a general work to disassemble the flyer object to purely hold logic triggers for underlying detectors, such that the stream resource/datum documents produced from a fly scan do not eject data about the flyer itself. See the project page readme for more details.

[abbiemery]

Closed with #116