feat: blue-purple-fade header option

[kaseybon]

Summary of changes

This pull request adds a new theme option to be used on the Who We Are page.

Relevant Links

• Designs: Figma
• Story: ADB-305

Test URLs:

• Before: https://main--adobe-design-website--adobe.aem.page/
• After: https://feat-adb-305-who-we-are-header--adobe-design-website--adobe.aem.page/who-we-are-revised

Checklist

• This PR has visual changes, and has been reviewed by a designer.
• This PR has code changes, and our linters still pass.
• This PR has new code, so new tests were added or updated, and they pass.
• This PR affects production code, so it was browser tested (see below).
• This PR has copy changes, so copy was proofread and approved.
• The content of this PR requires documentation, so we added a detailed description of the component's purpose, requirements, quirks, and instructions for use by designers and developers. This includes accessibility information if pertinent.

Validation

1. Make sure all PR checks have passed.
2. Pull down all related branches.

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Browser Testing

We should aim to support the latest version of the listed browsers. For older versions or other browsers not on the list, content should be accessible, even if it doesn't completely match the designs.

Developers should test as they work in the browsers available on their machines. If they have access to other devices to test other browser/OS combinations, they should do that when possible.

Windows

• Firefox
• Chrome
• Edge

MacOS

• Firefox
• Chrome
• Safari
• Edge

Android

• Firefox
• Chrome
• Edge

iOS

• Safari

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[aem-code-sync]

Hello, I'm the AEM Code Sync Bot and I will run some actions to deploy your branch and validate page speed.
In case there are problems, just click a checkbox below to rerun the respective action.

• Re-run PSI checks
• Re-sync branch

Commits

• 93f37e8 ✅ (latest)

[aem-code-sync]

	Page	Scores	Audits	Google
📱	/who-we-are-revised
🖥️	/who-we-are-revised