* Composite Action Run Steps
* Clean up trace messages + add Trace debug in ActionManager
* Change String to string
* Add comma to Composite
* Change JobSteps to a List, Change Register Step function name
* Add TODO, remove unn. content
* Remove unnecessary code
* Fix unit tests
* Add verbose trace logs which are only viewable by devs
* Sort usings in Composite Action Handler
* Change 0 to location
* Update context variables in composite action yaml
* Add helpful error message for null steps
Ethan Chiu