feat: recent ideas block - choose specific slugs

[jawinn]

Summary of changes

Adds an option to display specific articles in the recent ideas block by using a list of comma separated article slugs.
This requires the use of "ArticlesBySlug:" in the tag content column. Here is an example:
ArticlesBySlug: article-slug1, article-slug2

Any slugs that don't exist will be ignored and not displayed.

Includes an example and documentation in the Pattern Library.

Relevant Links

• Story: ADB-314

Test URLs:

• Before: https://main--adobe-design-website--adobe.aem.page/
• After: https://feat-posts-by-slug--adobe-design-website--adobe.aem.page/

Checklist

• This PR has code changes, and our linters still pass.
• In pattern library: 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.
3. Confirm working example in pattern library displays the specific slugs. The example shows that it works whether or not slashes, line breaks, or spaces are included in the comma separated content. And that a non existing article does not appear or cause errors.
4. Confirm no errors or change in posts displayed in the existing post lists on various pages (home, ideas, tag, pattern library, recent articles at the bottom of articles).

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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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Commits

• 5ad0e83 ✅ (latest)

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