Add blog post for 'Jenkins Design Library 3'

content/blog/2025/01/2025-01-10-design-library.adoc

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+---
+layout: post
+title: "Introducing Jenkins Design Library 3"
+tags:
+- jenkins
+- user-experience
+authors:
+- janfaracik
+opengraph:
+  image: /images/post-images/2025/01/2025-01-10-design-library/opengraph.png
+discourse: true
+---
+
+image::/images/post-images/2025/01/2025-01-10-design-library/opengraph.png[role=center]
+
+We’re thrilled to announce that link:https://weekly.ci.jenkins.io/design-library[**Jenkins Design Library 3**] is now live! 🎉
+
+With this release, we’ve refined every aspect of the library to provide better documentation for plugin developers and ensure a more consistent,
+accessible, and intuitive experience.
+
+'''
+
+=== So what's new?
+
+**A new consistent design**
+
+Every page has been refined to maintain a cohesive look and feel, making it easier than ever to work with Jenkins
+Design Library. All samples are now grouped into two clear categories — Components and Patterns — ensuring you can quickly
+find what you need. We've also introduced interactive examples, such as the new link:https://weekly.ci.jenkins.io/design-library/spacing[Spacing] sample, which'll make it
+easier than ever to find the component or pattern best suited for your needs.
+
+**New ‘Edit this page’ button**
+
+Want to contribute or suggest improvements? The new 'Edit this page' button makes it easy to jump in and collaborate.
+
+**Accessibility improvements**
+
+The library now respects user preferences for contrast (prefers-contrast) and motion (prefers-reduced-motion), making it more accessible for everyone.
+
+**Versions**
+
+Pages can now declare which Long-Term Support (LTS) release they’re compatible with, so you always know where the latest components are available.
+
+'''
+
+=== Available now 🚀
+
+Jenkins Design Library 3 is ready for plugin developers to explore and use. Head over to link:https://weekly.ci.jenkins.io/design-library[Jenkins Design Library] to dive in and see all the updates in action.
+
+**Thanks to the community 🎉**
+
+A huge thank-you to everyone who contributed to this effort. Happy coding!