SelectPanel: Add loading to props table

[TylerJDev]

Closes https://github.com/github/primer/issues/5285

Adds loading to SelectPanel props table

Changelog

New

• Add loading to props table for SelectPanel

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github (Learn more about how to run integration tests)

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Pull Request Overview

This PR updates the SelectPanel documentation by adding the new loading prop to its props table, ensuring users know how to control the loading spinner state.

• Introduces a loading entry in the SelectPanel props JSON.
• Specifies type, defaultValue, and description for loading.
• Aligns docs with the new feature that infers loading based on items.

Comments suppressed due to low confidence (2)

packages/react/src/SelectPanel/SelectPanel.docs.json:196

• The defaultValue is set to "false", but the description indicates the loading state is inferred when not provided. Consider setting defaultValue to "undefined" (with inference behavior) or updating the description to match the explicit default behavior.

"defaultValue": "false",

packages/react/src/SelectPanel/SelectPanel.docs.json:197

• [nitpick] The phrase "based on the contents of items available" is a bit awkward. Consider rephrasing to "based on the contents available in items" or simply "based on the available items contents" for clarity.

"description": "Whether the panel is in a loading state. When `true`, the panel will display a loading spinner. If `loading` is not provided, the panel will infer the loading state based on the contents of `items` available."

[github-actions]

size-limit report 📦

Path	Size
packages/react/dist/browser.esm.js	92.33 KB (0%)
packages/react/dist/browser.umd.js	92.37 KB (0%)