fix(UserIcon): Replace UserIcon with RhUiProfileFillIcon

[rebeccaalpert]

What:
This is one piece of #12400. Breaking it up by icon so it is easier to review.

Additional issues:

Summary by CodeRabbit

• Documentation
  • Updated the Nav examples documentation to use the updated profile icon component.
• Chores
  • Updated the Alert demo to render the new profile icon as the custom alert icon, keeping the demo visuals consistent with the documentation examples.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 461c7f1d-b354-4db3-b595-23f33ff0a5ff

📥 Commits

Reviewing files that changed from the base of the PR and between a72042e and 96b0619.

⛔ Files ignored due to path filters (2)

• packages/react-core/src/components/EmptyState/__tests__/Generated/EmptyStateIcon.test.tsx is excluded by !**/generated/**
• packages/react-core/src/components/EmptyState/__tests__/Generated/__snapshots__/EmptyStateIcon.test.tsx.snap is excluded by !**/*.snap, !**/generated/**

📒 Files selected for processing (2)

• packages/react-core/src/components/Nav/examples/Nav.md
• packages/react-integration/demo-app-ts/src/components/demos/AlertDemo/AlertDemo.tsx

✅ Files skipped from review due to trivial changes (1)

• packages/react-core/src/components/Nav/examples/Nav.md

---

Walkthrough

This PR replaces the UserIcon import with RhUiProfileFillIcon across examples and demo components. The Nav documentation example and the AlertDemo component are both updated to import and use the new icon.

Changes

Icon Replacement

Layer / File(s)	Summary
UserIcon to RhUiProfileFillIcon replacement packages/react-core/src/components/Nav/examples/Nav.md, packages/react-integration/demo-app-ts/src/components/demos/AlertDemo/AlertDemo.tsx	Icon import and usage are replaced from UserIcon to RhUiProfileFillIcon in Nav.md example documentation and AlertDemo component import and customIcon prop.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Possibly related PRs

• patternfly/patternfly-react#12378: Both PRs swap specific PatternFly React icon components in example/demo code and documentation.
• patternfly/patternfly-react#12245: Adds RH-ui icon support and exports including RhUiProfileFillIcon that this PR uses.

Suggested labels

Needs design review

Suggested reviewers

• kmcfaul
• thatblindgeye
• nicolethoen
• phcox

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and specifically describes the main change: replacing UserIcon with RhUiProfileFillIcon across the codebase.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[patternfly-build]

Preview: https://pf-react-pr-12452.surge.sh

A11y report: https://pf-react-pr-12452-a11y.surge.sh

[thatblindgeye]

Doesn't seem like we're using this icon in any Nav example, could just remove this import entirely

[rebeccaalpert]

Good call out; thank you!