Try making HeaderFooterView more robust (#7267)

* Try making `HeaderFooterView` more robust

Create `HeaderFooterLayout` to properly calculate the content size when the component is scrollable so it's at least the size of the available space.

* Make `DesktopNoticeView` scrollable

For this, `NumberedListOrganism` can't be a `LazyColumn`, since that's a lazy layout with no intrinsic height and Compose doesn't know how to size it.

* Fix the case where no header or content composables are supplied

* Fix insets in non-scrollable UI

* Remove `movableContentOf`, suppress the warning instead since the `isScrollable` parameter should never toggle this behavior

* Update screenshots

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Co-authored-by: ElementBot <android@element.io>

features/linknewdevice/impl/src/main/kotlin/io/element/android/features/linknewdevice/impl/screens/desktop/DesktopNoticeView.kt

@@ -67,6 +67,7 @@ fun DesktopNoticeView(
         title = stringResource(R.string.screen_link_new_device_desktop_title, appName),
         iconStyle = BigIcon.Style.Default(CompoundIcons.Computer()),
         modifier = modifier,
+        isScrollable = true,
         buttons = {
             Button(
                 text = stringResource(R.string.screen_link_new_device_desktop_submit),