add readme with cwl example

runs/README.md

+
+# CWL example with a docker container
+
+:bulb: Requires installation of a CWL runner and docker
+checkout CWL guides in the [DataPLANT Knowledge Base](https://nfdi4plants.org/nfdi4plants.knowledgebase/docs/guides/ComputationalWorkflows/index.html)
+
+```bash
+cd runs/fsResult1
+
+cwltool ../../workflows/FixedScript/FSharpArcCapsule.cwl ../FSharpArcCapsule.yml
+```
+
+This workflow creates the file [fsResult1/result.csv](fsResult1/result.csv).