feat(ghost-solid-button): add styling

[nataliadelmar]

Description

Although not speficied in Momentum Figma Library, there are some cases in which we need a ghost button that has a solid color without an outline: that is, a background that looks same color as theme background black/white, but it is not transparent and has no outline.

Like this but without the border/outline:

That is, a button with these properties:

• ghost = true and solid = true. If it would be ghost=false and solid=true, that should result in the primary button which has a solid color. If it would be ghost=true and solid=false, that would result in a button with a transparent background.
• outline = false

That makes this button, for example, work correctly because we need solid buttons with ghost backgrounds.

Links

Links to relevent resources.