fix(examples): show end-of-list message in infinite scroll example

[muraliavarma]

🎯 Changes

• Always include the loader/status row in the virtualizer count so "Nothing more to load" renders when there are no more pages
• Add a stop condition (nextOffset < 5) so the example actually demonstrates the end-of-list behavior

The issue was that count excluded the extra row when hasNextPage was false, meaning there was no virtual item slot to display the message.

Closes #1068

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

[changeset-bot]

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Latest commit: 1f89482

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