Add some utility code

Add some utility code

None of this is really "part of" turbot, but is instead some
standalone code I've written from time to time either while testing
functionality or when live-tweaking something during hunt as follows:

	sheets-test.py: Ensuring Google sheets API works as expected

	blocks-test.py: Debugging some Slack blocks formatting

	hunt-channel-topic-tweak.py: During MH 2021 it was useful (for
	a reason I don't recall at the moment) to be able to manually
	tweak the topic of some channels from a script and I whipped
	these up at the moment.

It's not clear if any of this will be useful going forward, but just
in case I'm holding onto it for now. We may just want to delete this
code if we find we don't end up using it.