pytmc parser misses TcIO interface declarations

[klauer]

e.g., https://github.com/tcunit/TcUnit/blob/master/TcUnit/TcUnit/ITFs/I_TestResults.TcIO from TcUnit

[klauer]

I fixed this downstream in blark and also redid the solution parser there with a focus on just getting parseable code out of projects (also with the ability to write them back to files).

pytmc still should pick up TcIO reading functionality in order to include it in the project summary, though, so this remains a TODO.