[A11Y] Modal views need `isModal` trait

[mltbnz]

To make Voiceover aware of the modally presented view all views presented from the app navigation need to append the isModal trait

.accessibilityAddTraits([.isModal])

Also this https://developer.apple.com/documentation/swiftui/view/accessibilityshowslargecontentviewer() should be added

and

https://developer.apple.com/documentation/swiftui/accessibilitytraits/isselected