Add DIAL init config script

### StatGPT Backend version

0.2.0

### What is the problem this feature will solve?

Currently there's no automated way to generate DIAL config for StatGPT development, and there's placholder for that step in README.

### What is the proposed feature or solution?

Implement init config script or init config cli command, depending on what makes more sense.

### What alternatives have you considered?

_No response_