fix: provide well formed sample scripts for tx generation

There's still some failures in shrinking that need to be addressed.

Author: abailly

lib/cardano-api-extra/cardano-api-extra.cabal

@@ -40,6 +40,7 @@ library
   build-depends:
     , aeson
     , base
+    , base16-bytestring
     , bytestring
     , cardano-api                                  >=10.14.1.0 && <10.15
     , cardano-binary                               >=1.7.1.0   && <1.8