Wildcard V2: `<ButtonLink />` Implementation

Created by: gitstart-sourcegraph

Wildcard implementation of the <ButtonLink/> component.

See Wildcard V2 - Planned work for more context

Acceptance criteria

• Component is implemented within Wildcard
• Component has tests
• Component is accessible
• Component matches Figma designs

Implementation details

Refs

• Gitstart Task
• SourceGraph Issue

1. Add new <ButtonLink/> to the Wildcard package.
   • See existing implementation here
   • Example of usage here.
2. Create a basic Storybook story that shows component usage.
3. Use the <button> component as a blueprint for the new component.