Implement SidebarListStyle

[Outcue]

First pass at the SidebarListStyle.

For this to be truly complete, work needs to be completed on ButtonStyles. I can look at that next. NavigationLinks in a Sidebar are Text items that draw a blue background when clicked (and perhaps when item is active.)

[Outcue]

I couldn't figure out how to add the label in order to pass the check-labels check.

[MaxDesiatov]

LGTM, thank you!

[j-f1]

Can you also remove the dividers?

[Outcue]

Can you also remove the dividers?

Sure. Let me take a look.

[Outcue]

I added a check for usage of the SidebarListStyle. This isn't my favorite way of checking capabilities, but I was unsure if I should add some sort of private protocol for "showsDividers" or not.

[j-f1]

I think that's a good way for now and we can re-evaluate later on if needed.

[MaxDesiatov]

Thanks for the updates!

[carson-katri]

You should probably just add a var addDividers: Bool { get } to the ListStyleDeferredToRenderer protocol, then provide a default value of true.

[Outcue]

I added "hasDividers" to the ListStyle. It wasn't clear how to add it to ListStyleDeferredToRenderer and have the code be clean.

Here is where the property is checked:

@ViewBuilder
  public static func listRow<V: View>(_ view: V, _ style: ListStyle, isLast: Bool) -> some View {
    (style as? ListStyleDeferredToRenderer)?.listRow(view) ??
      AnyView(view.padding([.trailing, .top, .bottom]))
    if !isLast && style.hasDividers {
      Divider()
    }
  }
}

[MaxDesiatov]

Thank you @Outcue!