Ewoks binding docs

Some thoughts I wanted to keep

When EWOKS executes a workflow, it wraps the graph and the tasks at runtime with an instance of the python class TaskGraph or Task respectively to ensure common behavior of EWOKS workflows for all supported workflow engines. This includes reading different graph formats, data transfer between tasks, handling errors, emitting ewoks execution events and task output caching. Creating a binding with a WFMS involves connecting TaskGraph and Task to the equivalent runtime representation of graphs and tasks used by the WFMS.