Add indeterminate state to RadialProgress

[marcomontalbano]

What I did

• Widen RadialProgress's percentage prop to number | "indeterminate", for work that has started but has no knowable end (eg: a request handed to a background worker).
• Render the indeterminate state as a spinning three-quarter arc.
• Title the SVG In progress when indeterminate, alongside the existing Pending and <n>% titles.
• Add an Indeterminate story and tests covering the new state, its title, and its transform.

How to test

https://deploy-preview-1227--commercelayer-app-elements.netlify.app/?path=/docs/atoms-radialprogress--docs#indeterminate

1. Run pnpm dev and open Storybook.
2. Go to Atoms → RadialProgress → Indeterminate: the arc should spin continuously, with a quarter of the circle left open.
3. Check Pending and Percentage are unchanged: the dashed circle and the filled circle still start at 12 o'clock and do not spin.
4. In the Indeterminate story controls, add an icon (eg: shoppingBag) and confirm it renders centered on a white fill.
5. Hover each story and confirm the tooltip reads In progress, Pending, and 42% respectively.
6. Run pnpm test and pnpm ts:check.

Checklist

• Make sure your changes are tested (stories and/or unit, integration, or end-to-end tests).
• Make sure to add/update documentation regarding your changes.
• You are NOT deprecating/removing a feature.

[netlify]

✅ Deploy Preview for commercelayer-app-elements ready!

Name	Link
🔨 Latest commit	c3c3a9d
🔍 Latest deploy log	https://app.netlify.com/projects/commercelayer-app-elements/deploys/6aa17003291b5600082cd3bf
😎 Deploy Preview	https://deploy-preview-1227--commercelayer-app-elements.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[pkg-pr-new]

npm i https://pkg.pr.new/commercelayer/app-elements/@commercelayer/app-elements@1227

commit: c3c3a9d