RFC: Move all ekg-* packages into a monorepo

[23Skidoo]

Hi @tibbe @ejconlon

How do you feel about moving all four ekg-* packages into a monorepo with a top-level cabal.project (preserving history, of course). This'd simplify CI and people would only need to create one PR for changes like adding new GHC version support that touch multiple ekg packages.

[tibbe]

That sounds reasonable. Could you try to make a mono repo so I can have a look?

[ejconlon]

Love it! Do you have a handle on it, or do you need help?

[23Skidoo]

I think I'll manage.

[ejconlon]

I can help filter through issues and move them to the new repo if they are still relevant.