Add single-choice/multi-choice node for work flow

[delinecnlin]

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1. Is this request related to a challenge you're experiencing?

Cannot use predefined choice+answer pair to make determined jump to a route.

2. Describe the feature you'd like to see

In the workflow users can simply click on choice options like suggested question to go to next node, variables can also be applied to each choice, then a message node can be added to reply the predefined message for this choice.

3. How will this feature improve your workflow or experience?

More controllable

4. Additional context or comments

No response

5. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.