Ref: https://docs.github.com/en/actions/writing-workflows/workflow-syntax-for-github-actions#onworkflow_dispatchinputs

#454, #439 are to some extend prerequisites

#753 also related

• Webui: trigger dag requiring user input
• API: trigger dags from the same user inputs
• YAML: define input syntax
• CLI: inputs defined in input YAML file / Piped