🎉 happy birthday LibreChat

[berry-13]

Summary

I want this icon all year, so I created a .env var for it

SHOW_BIRTHDAY_ICON=true

Even if you don't set it, it will appear. Maybe later, we'll leave it as false even without setting it. But if someone wants it all year (like me), they can keep it!

Change Type

• [x] New feature (non-breaking change which adds functionality)
• [x] 🎉

Checklist

• [x] My code adheres to this project's style guidelines
• [x] I have performed a self-review of my own code
• [x] I have commented in any complex areas of my code
• [x] I have made pertinent documentation changes
• [x] My changes do not introduce new warnings
• [x] I have written tests demonstrating that my changes are effective or that my feature works
• [x] Local unit tests pass with my changes
• [x] Any changes dependent on mine have been merged and published in downstream modules.