Use consistent namespace for ShelleyLedgerEra in cardano-balance-tx.

[jonathanknowles]

Issue

ADP-3184

This PR follows on from #4185 and #4229.

Description

This PR:

• corrects an inconsistency between Cardano.Write.Tx and other modules in the cardano-balance-tx library.
• arranges that ShelleyLedgerEra is always imported into the CardanoApi namespace.

[Anviking]

I believe this,

• corrects an inconsistency between Cardano.Write.Tx and other modules in the cardano-balance-tx library.
• arranges that ShelleyLedgerEra is always imported into the CardanoApi namespace.

is fulfilled now after #4252 and that this now can be closed — do you agree?

git grep "ShelleyLedgerEra"                                                                                                               (1) (4s 175ms)
lib/balance-tx/lib/internal/Internal/Cardano/Write/Tx.hs:    , CardanoApi.ShelleyLedgerEra
lib/balance-tx/lib/internal/Internal/Cardano/Write/Tx.hs:    , CardanoApi.ShelleyLedgerEra (CardanoApiEra era) ~ era
lib/balance-tx/lib/internal/Internal/Cardano/Write/Tx.hs:    -> Maybe (RecentEra (CardanoApi.ShelleyLedgerEra era))
lib/wallet/src/Cardano/Api/Extra.hs:    ( ShelleyLedgerEra
lib/wallet/src/Cardano/Api/Extra.hs:  -> Ledger.PParams (ShelleyLedgerEra era)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Allegra.hs:    :: ShelleyTx (Cardano.ShelleyLedgerEra AllegraEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Allegra.hs:fromAllegraTx' :: ShelleyTx (Cardano.ShelleyLedgerEra AllegraEra) -> W.Tx
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Alonzo.hs:    :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra AlonzoEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Alonzo.hs:                    . Core.hashScript @(Cardano.ShelleyLedgerEra AlonzoEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Alonzo.hs:fromAlonzoTx' :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra AlonzoEra) -> W.Tx
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Babbage.hs:    :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra BabbageEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Babbage.hs:    hashBabbageScript = Core.hashScript @(Cardano.ShelleyLedgerEra BabbageEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Babbage.hs:fromBabbageTx' :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra BabbageEra) -> W.Tx
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Conway.hs:    :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra ConwayEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Conway.hs:    hashConwayScript = Core.hashScript @(Cardano.ShelleyLedgerEra ConwayEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Conway.hs:fromConwayTx' :: Alonzo.AlonzoTx (Cardano.ShelleyLedgerEra ConwayEra) -> W.Tx
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Features/Mint.hs:        Core.hashScript @(Cardano.ShelleyLedgerEra Cardano.AlonzoEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Features/Mint.hs:        Core.hashScript @(Cardano.ShelleyLedgerEra Cardano.BabbageEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Features/Mint.hs:        Core.hashScript @(Cardano.ShelleyLedgerEra Cardano.ConwayEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Mary.hs:    :: SL.ShelleyTx (Cardano.ShelleyLedgerEra MaryEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Mary.hs:    SL.ShelleyTx (Cardano.ShelleyLedgerEra MaryEra) ->
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Shelley.hs:    :: ShelleyTx (Cardano.ShelleyLedgerEra ShelleyEra)
lib/wallet/src/Cardano/Wallet/Read/Primitive/Tx/Shelley.hs:fromShelleyTx' :: SL.ShelleyTx (Cardano.ShelleyLedgerEra ShelleyEra) -> W.Tx
lib/wallet/src/Cardano/Wallet/Shelley/Transaction.hs:    , ShelleyLedgerEra
lib/wallet/src/Cardano/Wallet/Shelley/Transaction.hs:    case Write.recentEra @(ShelleyLedgerEra byronEra) of {}
lib/wallet/test/unit/Cardano/Wallet/Shelley/TransactionSpec.hs:    , ShelleyLedgerEra
lib/wallet/test/unit/Cardano/Wallet/Shelley/TransactionSpec.hs:    -> ((CardanoApiEra (ShelleyLedgerEra era) ~ era) => a)
lib/wallet/test/unit/Internal/Cardano/Write/Tx/BalanceSpec.hs:    :: Era (CardanoApi.ShelleyLedgerEra era)

And thanks for waiting and apologies for any unclarity about motivation!