Move Hyperledger Transact to Dormant state

[tkuhrt]

The Hyperledger Transact codebase is now maintained as part of Hyperledger Sawtooth's lib repository which you can find here: https://github.com/hyperledger/sawtooth-lib. As such, the maintainer's have requested that the project be moved to a Dormant state while the transition occurs and eventually be moved to EOL state.