Clean up the repo a bit, and add some unit tests

• Add a bunch of unit tests for different workflows
• Rework the different util modules and merge them where relevant
• Resolve some TODO items in config.py (netmasks are now validated)
• Add some :term: directives to docstrings
• Resolve a pytest warning about an unregistered mark @pytest.mask.workflow

test/workflows/iptrunk/test_create_iptrunk.py

@@ -15,7 +15,7 @@ from test.workflows import (
     extract_state,
     resume_workflow,
     run_workflow,
-    user_accept_and_assert_suspended
+    user_accept_and_assert_suspended,
 )