fix(Toolbar): add width and flex-grow props to ToolbarItem; add flex-grow to ToolbarGroup; update demo and tests

[khadesamrudhi]

This PR adds the previously removed widths prop to <ToolbarItem /> and introduces a new flexGrow prop that maps to .pf-m-flex-grow[on-{breakpoint}] modifiers.

Changes

• Added responsive widths and flexGrow support using formatBreakpointMods
• Updated unit tests to verify classnames
• All ToolbarItem tests passing ✅

Closes #11910

[patternfly-build]

Preview: https://pf-react-pr-12074.surge.sh

A11y report: https://pf-react-pr-12074-a11y.surge.sh

[khadesamrudhi]

First-time contributor, could a maintainer please approve workflows and re-run the failed job?

Notes:

• The TypeScript parse error in packages/tsconfig.base.json was fixed.
• Remaining failure is a transient Surge preview upload DNS error (EAI_AGAIN), unrelated to code changes.
• Changes are limited to ToolbarItem widths + flexGrow, ToolbarGroup flexGrow, tests, demo, and types/global.d.ts.

Thanks!

@mcoker @kmcfaul @thatblindgeye

[khadesamrudhi]

I’ve fixed the packages/tsconfig.base.json JSON issue and pushed the update. Could you please approve the workflows and re-run the CI? If Surge preview shows EAI_AGAIN, it indicates a transient network error that we can retry. Thanks!

[khadesamrudhi]

Hi, all automated checks have passed. Requesting a review when convenient. Please let me know if any additional changes are needed. Thank you.
@mcoker @thatblindgeye @kmcfaul

[khadesamrudhi]

Pushed updates to fix review feedback:

• ToolbarItem: widths applied via setBreakpointCssVars using base token c_toolbar__item_Width; flexGrow via formatBreakpointMods; removed hardcoded data-testid; JSDoc clarifies flexGrow=1.
• ToolbarGroup: flexGrow via formatBreakpointMods; JSDoc updated.
• Tests: ToolbarItem width tests assert CSS var per breakpoint.

No extra demo files included. Previous CI errors from missing react-tokens imports should be resolved. Could you please approve the workflow run so CI can proceed?

@thatblindgeye @mcoker @kmcfaul