Organise repos by directorate

[iw-ezequiel]

Also: can we get a split of repos by directorate, say? Does enterprise give us better options for grouping/classifying repos? What about tagging repos by business area?

(The list is going to get much bigger, and it's already fairly big - it's get difficult to manage)

Originally posted by @andyblundell in https://github.com/NHSDigital/software-engineering-quality-framework/issues/166#issuecomment-945584887