Update warning color

[homing1]

Link: preview

This PR updates the warning color to match Fluent on light theme. Fluent uses orange colors for warning, but they also have yellow colors. Therefore, this PR adds both a yellow and orange palette. Also updating warning colors for dark and high contrast theme to make everything orange for consistency.

Testing

1. Visit the following pages to review the affected colors, should still work on dark and high contrast theme. Compare with https://react.fluentui.dev/ . Also compare with https://design.learn.microsoft.com/ for the current Atlas colors.

• Badge | Atlas Design | Microsoft
  • Fluent storybook shows warning badge as yellow, which seems incorrect, https://react.fluentui.dev/?path=/docs/components-badge-badge--docs
  • Figma shows orange, https://www.figma.com/design/FO4ImdAytGCc5DQXpNFObI/Microsoft-Fluent-2-Web-(Community)?node-id=8911-3186&node-type=canvas&t=LXqfwjT3ovisb3kn-0
• Button | Atlas Design | Microsoft
  • Fluent doesn't have warning buttons
• Notification | Atlas Design | Microsoft
  • Inspect the last notification and change notification-primary to notification-warning.
  • https://react.fluentui.dev/?path=/docs/components-messagebar--docs
• Progress Bar | Atlas Design | Microsoft
  • Fluent uses a dark orange instead, which seems inconsistent. Keeping as warning base for consistency
  • https://react.fluentui.dev/?path=/docs/components-progressbar--docs

Additional information

[Optional]

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[changeset-bot]

🦋 Changeset detected

Latest commit: fbaebc7

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@microsoft/atlas-css	Minor

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[BenDMyers]

Worth updating /components/button.html documentation to clarify orange in light mode, yellow in dark/HC?

[ollips]

As a follow up I'd like to chat how we can improve buttons style. Approving for now

[ollips]

Resetting my vote, I think I missed something. Will follow up