feat: Add CDF copyright text and links (#163)

From the [Advocacy & Outreach SIG meeting on May
15](https://community.jenkins.io/t/2025-may-15-advocacy-outreach-sig-meeting/31270/2),
CD Foundation has asked that we include their copyright/terms of use
information on the jenkins.io site. I have added the requested text and
links to the footer of the page so that it is present in all areas.

Storybook preview:
<img width="1723" alt="Screenshot 2025-05-16 at 9 51 44 AM"
src="https://github.com/user-attachments/assets/fa8b0129-564b-4920-a2b6-89910c1e1bcc"
/>

---------

Co-authored-by: Kris Stern <[email protected]>

Author: kmartens27

src/jio-footer.ts

@@ -200,6 +200,18 @@ export class Footer extends LitElement {
          </div>
       </div>
    </div>
+   <div class="container">
+     <div class="row">
+        <p>
+           Copyright © 2025 CD Foundation The Linux Foundation®. All rights reserved.
+           The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see our 
+            <a href="https://www.linuxfoundation.org/legal/trademark-usage" target="_blank">Trademark Usage</a> page.
+           Linux is a registered trademark of Linus Torvalds. 
+            <a href="https://www.linuxfoundation.org/legal/privacy-policy" target="_blank">Privacy Policy</a> and 
+            <a href="https://www.linuxfoundation.org/legal/terms" target="_blank">Terms of Use</a>.
+         </p>
+      </div>
+   </div>
 </footer>
     `;
    }