feat: ✨ list label for repository card

[konhi]

1. ❌ Currently, user has to click on list menu to check if it belongs to any list.

2. ✔ List label allows the user to instantly identify to which list repositories belong.

3. 🎨 Here are some visual suggestions!

[brianlovin]

Thanks for the note! Agreed, it's not very clear right now when a repository belongs to a list. I'll add your +1 to our tracking issue for this.