[WORKFLOW] Support new pattern workflow

[catcherwong]

After dtm v1.15.1, it support a new pattern named workflow, we should add support for this pattern.

see https://en.dtm.pub/practice/workflow.html

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在 dtm v1.15.1 版本之后，支持了一种新模式 workflow，同样应该支持这种模式。

参考 https://dtm.pub/practice/workflow.html

[wooln]

The branch interceptor needs to be implemented.