Implement pretty print for test output

Summary

This MR provides a pretty print on terminal for the test output. This may produce a relatively long output, but it's far more clear.

Use Cases

For debugging. In the near future we can use this for evaluating the build process in the CI.

Documentation

No.

Function Documentation

• I didn't write any new functions.

Are there parts of the documentation we have to adjust?

• No.

Tests

Are we able to test this new feature?

• Via command line output.

Changelog

• I added a statement to the CHANGELOG.

Related Tickets

Closes

Closes #92 (closed)

/cc @mrodzis @mgoebel