[Enhancement] Workflow Feature Implementation: Support running as a task executor

### Search before asking

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

### Enhancement Request

As a task executor, extend the ability to register tasks

### Describe the solution you'd like

As a task executor, extend the ability to register tasks

### Are you willing to submit PR?

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

The issue names no files, tests, or entry points. Start by locating the workflow task-registration and task-executor components, then determine the registration and execution contract; done means tasks can be registered and run through the executor.

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