Create `Button` component

[mmaismma]

Expectations

A basic button extending the regular <input type="button | submit"> element should be created. It should support the following, for starters:

• leading icon
• trailing icon
• width prop with possible values "hug" | "fill" | number

It should also take care to expose as much of the regular <input> element's attributes.

Reference

Sample image from the shared Figma project, showing an input field with a placeholder and a suffix text:

[mmaismma]

It would be useful if the component could include a way to show a "processing" state. The component could provide two methods: startProcessingState and stopProcessingState for this.

Example, from Discord's mobile app