fix: [iPadOS 18] Disable the new UITabBarController view style in iPadOS 18

[maheshwaripurvesh]

Description

Since iPadOS 18, the Bottom Tab Bar on iPads is now positioned at the top of the screen, floating over the content, instead of at the bottom. This may be the feature by Apple in new version however creating poor user experience

Fix

1. Check the ios18 and iPad variant
2. If above condition statisfy, apply following

   .traitOverrides.horizontalSizeClass = UIUserInterfaceSizeClassUnspecified;

This will disable the new UITabBarController view style in iPadOS 18

References

Announcement: https://developer.apple.com/design/human-interface-guidelines/tab-bars#iPadOS