[Task] UI/UX - Integrate Image renderer with cached_image_network

[atnanahidiw]

Description

To enable offline mode in the future, let's research how to cache the image.

Delivery

• [x] Change image preview that uses URL wrap it with cached_image_network lib
• [x] Create a new widget HtmlWithCachedImages which integrates cached_image_network for handling image load in Html lib
• [x] Change Html to HtmlWithCachedImages
• [x] Try the quiz again with no internet. Is it still running smoothly?