Handle IOTTY output in process_output

[timothy-nunn]

I forgot to add a handler for terminal output to the Pythonised write function

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46.67%. Comparing base (f3aea24) to head (959a52e).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3854   +/-   ##
=======================================
  Coverage   46.66%   46.67%           
=======================================
  Files         122      122           
  Lines       27804    27806    +2     
=======================================
+ Hits        12976    12978    +2     
  Misses      14828    14828           

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