Library theming: Update Icons in design kit

[patternfly-jira-sync]

Update the Icons in the PatternFly design kit to align with the unified theme (icon set / library files, tokens, and branded icons as needed). Update Figma files, styles, documentation, and ensure unified visual consistency throughout.

Deliverables:

• Update tokens

• Include new variants

• Update branded icons

• Address audit fixes: (also noting in Menu & Table issues)

• **Favorite icon: **The pattern we use for favouriting uses a gold star icon when selected. This gold colour is close to a colour contrast issue so the team has decided to switch to using an unfilled star by default that transitions to a filled star icon. The new animation styling is still applicable with this update.

• Default: Filled black star

• Hover: No icon change button background colour changes

• Click: Animating transition with short scale change and colour from black to gold.

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Jira Issue: PF-3923