Add Visualization Feature to the AI Service

[Candytigers]

The current AI service only support answers with SQL statement. It would be super helpful if there's a new feature to generate visualization with the answers. For example, it could return a bar chart as requested with a question like: Could you generate a bar chart with total quantity sold for each product?

[wwwy3y3]

That's a nice feature request @Candytigers

Could you share more about why you think it's critical at our discussion thread here: #620

Your feedbacks will help us understand your scenarios.