Migrate: Onboarding layout component

[asuwebdesign]

We're looking to implement these designs from Figma: https://www.figma.com/design/MSr6kVEOuAxmPOkjg7x8PO/PatternFly-6--Patterns---Extensions?node-id=9362-30416&m=dev

• Use ChatbotModal component to create an OnboardingModel component similar to terms of use modal
• We should be able to focus it similar to terms of use with skip to content
• Image and content should be customizable
• Add demo and tests