feat(button): add icon only option for small screens

[namtheho]

Description

For Button module, add an icon only option for small screens.

Engineering pre-requisites

• Successful design review with Design System Team.
• Supports dark mode.
• Supports responsive design.
• Tokens have been provided (or already exist).
• Successful accessibility review with Core A11Y Team.
• Successful frontend review with eBayUI Team.

[agliga]

This is only for trailing icon, the code for turning this into an icon only button will come later

[ArtBlue]

@namtheho , I cannot tag Randy for some reason. The Figma links are not pointing to a trailing button icon. Can we have the actual specs?

[randybascue]

@ArtBlue Weird that it's doing this again. Here are the specs

[ArtBlue]

I removed a comment with an image of the button specs that did not include a trailing icon.

[ArtBlue]

I updated this issue to target button as cta-button is an <a> and cannot have the use case (down chevron for lists) attached to the design specs.

[ArtBlue]

@randybascue , @namtheho , so we actually already have a trailing icon option in Button. Given this, I'm simply repurposing this issue to implement the addition of the icon only option responsively on small screens/container. I'm blocking it for design since we need the specs.