Import a raw transaction

[bitjson]

read.cash says:

..and one more feature request: there's Meep debugger by
@ChrisPacia
https://read.cash/@Read.Cash/how-to-use-bitcoin-cash-with-javascript-including-bitcoin-cash-contracts-08fdc194#meep it's really great, but you need to install it. It would've been cool if it were possible to import a raw hex transaction to BitAuth IDE and see why it fails.

(More comments in that thread.)

We currently support importing bytecode as a script, but it would be great if we could import a full raw transaction, and maybe choose to import any number of the inputs and outputs as the proper script types.

This would be a good feature to add once "transaction scenarios" are available, since we can also import the locktime + sequence numbers into scenarios.