feat(Alert): adding gap preset

[connerblanton]

🔗 Linked issue

#760

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Added a gap preset to the Alert component. This allows customization of the gap class, allowing users to match the gap to their custom padding like mentioned in the linked issue. Resolves #760

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[vercel]

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Name	Status	Preview	Updated (UTC)
ui	✅ Ready (Inspect)	Visit Preview	Oct 25, 2023 1:57pm

[benjamincanac]

Closing in favor of 91511b9 as there was more to be done and also to replicate the behaviour in the Notification component as you can see here: 7cb987d