[TR#147] Sensible file input styles

[Jeremy-Walton]

Task

TR #147

Why?

@zoopmaster noticed that inputs with type set to file were not being styled correctly. This remedies that!

What Changed

• [X] Add sensible style for input of type file
• [X] Add option to docs playground

Sanity Check

• Have you updated any usage of changed tokens?
• [X] Have you updated the docs with any component changes?
• Have you updated the dependency graph with any component changes?
• [X] Have you run linters?
• [X] Have you run prettier?
• [X] Have you tried building the css?
• [X] Have you tried building storybook?
• Do you need to update the package version?

Screenshots

Before:

After:

[Jeremy-Walton]

Form control of type file