chore: update UI demo styling

[androbwebb]

Pull Request Checklist

Update the styling on the demo app. New images and new colors.

• Did you add new tests and confirm existing tests pass? (yarn test)
• Did you update relevant docs? (docs are found in the site folder, and guidelines for updating/adding docs can be found in the contribution guide)
• Do your commits follow the Conventional Commits standard?
• Does your PR title also follow the Conventional Commits standard?
• If you have a breaking change, is it correctly reflected in your commit message? (e.g. feat!: breaking change)
• Did you run lint (yarn lint:check) and fix any issues? (yarn lint:write)
• Did you follow the contribution guidelines?

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PR-Codex overview

This PR focuses on updating the UI components and images in the examples/ui-demo application, including color changes, image replacements, and style adjustments.

Detailed summary

• Updated color scheme in config.tsx for primaryColor.
• Replaced images in multiple components with new SVGs.
• Adjusted class names and styles in various components for improved layout.
• Removed deprecated images from public directory.

The following files were skipped due to too many changes: examples/ui-demo/public/images/multi-factor-auth.svg

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