[Documentation] Summarize supported Workflow Frameworks

[jan-janssen]

Name	Import from Python Workflow Definition	Export to Python Workflow Definition
aiida-workgraph	✅	✅
jobflow	✅	✅
pyiron_base	✅	✅
executorlib	supported, but workflow is executed directly	❌
Python	supported, but workflow is executed directly	❌
CWL	supported, but inputs are stored in pickle files	❌
pyiron_workflow	work in progress	work in progress