Cylc file for generic Launch task

[sk8forether]

Description

Need to create a flow.cylc style file for the generic launch task as part of the MVP. This task will need to:

• create directories
• create a json object of inputs

Background

Previously (in Cylc 7), the Cylc "suite" was defined in a suite.rc file. In Cylc 8, Cylc "workflows" have replaced them, and are defined in flow.cylc files that define the Workflow Configuration.

Next Steps

• Understand flow.cylc files in Cylc 8
• Create one for the Launch task
• Test that it works when called directly by Cylc on the command-line
• Test that it works correctly when called by python
• Test that it works for 2 platforms