Library theming: Update Breadcrumbs component in design kit

[andrew-ronaldson]

Update the Breadcrumbs component files in the PatternFly design kit to reflect the new unified theme. Ensure all relevant tokens, styles, and documentation follow the unified specifications.

Deliverables:

• Update tokens

• Include new variants

• Update branded icons

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Jira Issue: PF-3673

[patternfly-jira-sync]

Closed via Jira sync - Jira issue PF-3673 was closed.