Revise the design again for final review

[kuke]

No description provided.

[varunarora]

I am going to do this soon - any key areas you want me to focus on making sure look good, @kuke?

[kuke]

@varunarora Cool! Now we that have a prototype convertor (#19 may be more close to the final one), we should have more ideas about the section How it works in design doc, and the Project structure is also different from our current implementation. And you can also try to make the English expression more native and more grammatical, etc.

Thanks!

[varunarora]

I think we are good here, open if work is still needed.