Add list with top content playground

[joshuakcockrell]

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This adds a playground that shows off a bug. Scrolling down and then up is impossible ~50% of the time on Android. The List stutters up and down.

Skip Pull Request Checklist:

• REQUIRED: I have signed the Contributor Agreement
• [] REQUIRED: I have tested my change locally with swift test
• OPTIONAL: I have tested my change on an iOS simulator or device
• OPTIONAL: I have tested my change on an Android emulator or device

[joshuakcockrell]

Here's a video of the bug occurring on Android.

screen-20251004-232403.mp4

[joshuakcockrell]

It also happens if you do an HStack with two Spacer() instead of .frame(maxWidth: .infinity)

[joshuakcockrell]

Here's the UI that lead to me finding this bug. It's not just some random combination of views I came up with to try and break Skip.

This UI (in the screenshot) works if you use ScrollView & LazyVStack, but breaks if you instead use List, like the code shows.