RichTextDisplayField: Support inline icon rendering in value array

[pglevy]

Summary

Current Behavior

The value prop only supports strings and RichTextItem objects (bold, italic, etc.). Inserting an icon requires breaking out of the component entirely and using raw Lucide JSX alongside it.

Desired Behavior

<RichTextDisplayField
  value={[
    { icon: CheckCircle, color: "POSITIVE", size: "STANDARD" },
    " Task completed successfully"
  ]}
/>

Props for inline icon item

• icon — Lucide icon component
• color — semantic color (POSITIVE, NEGATIVE, ACCENT, etc.)
• size — SMALL / STANDARD / MEDIUM / LARGE
• altText — for accessibility

SAIL Reference

• https://docs.appian.com/suite/help/25.3/Rich_Text_Icon_Component.html

Notes

• Icon should be vertically aligned with surrounding text
• Should work inline within paragraphs and alongside other rich text items