Add AssetIcon props documentation and Storybook story

[Copilot]

AssetIcon had no documentation entry — its props were invisible to consumers since README.mdx only referenced Asset.tsx in its typescript frontmatter and had no <PropsTable> entry for AssetIcon.

Changes

• README.mdx: Add ./src/AssetIcon/AssetIcon.tsx to typescript frontmatter; add AssetIcon to import examples; add ### AssetIcon usage section and <PropsTable of="AssetIcon" /> to Props API reference
• examples/AssetIconExample.tsx (new): Example rendering all 11 asset type icons
• stories/AssetIcon.stories.tsx (new): Storybook stories (Basic with controls, Overview showing all types) under Components/Asset/AssetIcon
• AssetIcon.tsx: Simplify AssetIconProps — remove Omit<GeneratedIconProps, 'illustration' | 'ref'> since neither illustration nor ref exist on GeneratedIconProps; extend it directly instead

// Before
export interface AssetIconProps
  extends Omit<GeneratedIconProps, 'illustration' | 'ref'> {
  type?: AssetType;
}

// After
export interface AssetIconProps extends GeneratedIconProps {
  type?: AssetType;
}

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 602ea45

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
forma-36	Ready	Preview	Mar 5, 2026 11:21pm
forma-36-storybook	Ready	Preview	Mar 5, 2026 11:21pm

[Kathrin Holzmann (Lelith)]

Sam Ashley (@sam-is-content) are you the owner of this PR? Could you add please some before/after screenshots for this?

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
CommonJS	131.96 KB (0%)	2.7 s (0%)	33 ms (+234.43% 🔺)	2.7 s
Module	128.81 KB (0%)	2.6 s (0%)	26 ms (+163.69% 🔺)	2.7 s

[github-actions]

Marking pull request as stale since there was no activity for 30 days