feat: restore mascot reference in footer

Summary

Restores the panda emoji mascot link that was originally added in commit 10aa6d92 but was lost during the website rewrite.

Changes

• Modified components/Footer.tsx to add back "🐼 Meet our mascot!" link
• Link points to Instagram with proper security attributes (rel="noopener noreferrer")
• Includes accessibility attributes (target="_blank")
• Maintains consistent styling with other footer links

This restores a fun community feature that helps connect users with the project's mascot.