feat: create collection TDE-453

[MDavidson17]

arg	desc	user input required?
--uri	path to items & write location of collection.json	no, s3://..../flat/
--collection_id	ulid	no, output of generate_ulid
--title	collection title	yes
--description	collection description	yes

note: there is currently no validation of --title, in future, this may need to be added if the title is going to be used to determine the publish path.