feat: add pushToTop and pushToTopOnce

[bnb]

🔗 Linked issue

#172

❓ Type of change

• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

This PR adds pushToTop and pushToTopOnce and adds tests for pushToTop, mirroring pushTo's tests. I've run the tests locally and it works.

I've got a situation where I have a list of events in the future and in the past, and I want the ones in the past to be in reverse chronological order but the ones in the future to be in chronological order. Rather than having to do that logic in JS, it'd be super nice to just be able to do that with Edge. pushToTop makes it super simple to set the events in the past in reverse chronological order without any JS logic around this in my app.

📝 Checklist

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

[bnb]

I'll work on a docs PR now ✅