Change images on welcome Screen

[Benunc]

Issue Overview

Some of the images on the plugin's initial welcome screen require significant custom code to implement. We should highlight what our plugin does with no expert-level CSS.

Expected Behavior

New Users should see default form options.

Current Behavior

New Users get a false representation of how forms look, out of the box. This results in support tickets for essentially over-promising.

Possible Solution

Add some images from our new Features section, instead, potentially linking the images to the features or documentation.

Related PRs

#1318

Todos

• New images
• Properly handle responsiveness for screen size
• Link to associated feature page?
• general tests