fix(workflow): list composite plans (#3218)

Author: mohammad-alisafaee

renku/command/view_model/composite_plan.py

@@ -221,6 +221,7 @@ def __init__(
         self.touches_existing_files = touches_existing_files
         self.latest = latest
         self.type = "CompositePlan"
+        self.full_command = ""
 
         if duration is not None:
             self.duration = duration.seconds

tests/cli/test_workflow.py

@@ -161,6 +161,9 @@ def test_workflow_compose(runner, project, run_shell):
     assert composite_plan.mappings[1].default_value == "other_output.csv"
     assert composite_plan.mappings[1].description == "the final output file produced"
 
+    result = runner.invoke(cli, ["workflow", "ls"])
+    assert 0 == result.exit_code, format_result_exception(result)
+
     result = runner.invoke(cli, ["graph", "export", "--format", "json-ld", "--strict"])
     assert 0 == result.exit_code, format_result_exception(result)