feat(storybook): add the swc preview

[castastrophe]

Description

Add a look-through to the Spectrum Web Components Storybook project to create an easier connection between components that exist in CSS and those in SWC.

How and where has this been tested?

Please tag yourself on the tests you've marked complete to confirm the tests have been run by someone other than the author.

Validation steps

• [ ] Open storybook. Scroll down to the bottom of the side navigation. Expect to see Spectrum web components as a collapsed menu item. Expand that and expect to see the content that aligns with this link: https://opensource.adobe.com/spectrum-web-components/storybook/

To-do list

• [x] I have read the contribution guidelines.
• [x] I have updated relevant storybook stories and templates.
• [x] ✨ This pull request is ready to merge. ✨