README: Add codex instructions
README: Add codex instructions
Bodigrim/SublimeHaskell,SublimeHaskell/SublimeHaskell,tomv564/SublimeHaskell,hcarvalhoalves/SublimeHaskell,bscottm/SublimeHaskell,kgadek/SublimeHaskell,kgadek/SublimeHaskell,tomv564/SublimeHaskell,SublimeHaskell/SublimeHaskell,hcarvalhoalves/SublimeHaskell,bscottm/SublimeHaskell,Bodigrim/SublimeHaskell