[Feature] Feature title

### Search before asking

- [x] I had searched in the [issues](https://github.com/apache/eventmesh-workflow/issues?q=is%3Aissue) and found no similar issues.


### Feature Request

I would like to implement a BPMN approval process based on EventMesh Workflow. Are there any plans to implement this feature in the future?

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!