Refactor `FromJSON (TxOut CtxTx era)`

[Jimbo4350]

The FromJSON (TxOut CtxTx era) instance is a mess and needs to be refactored.

[github-actions]

This issue is stale because it has been open 30 days with no activity. Remove stale label or comment or this will be closed in 120 days.

[github-actions]

This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 100 days.