[Woo POS] [Variable Products] Show the ItemList in a NavigationStack and allow navigation from the root list to child variation lists.

[joshheald]

Description

We will add a nested NavigationStack as the root of the ItemListView. It should have the standard navigation bar hidden, and our existing styled header used instead.

The path should use POSItem and navigationDestination to show an ItemList, which will either be the root, or a sublist of variations.

The back button will need to be custom, and should be chevron.backward SF symbol – not the Android style as in the designs.

• Fetch variations and show them in navigation stack [Variable Products] Fetch variations and show them in reusable ItemList in a NavigationStack #14786
• Show variation name with product attributes [Woo POS] [Variable Products] Show variation name based on variation and variable product attributes #14807
• Rename PointOfSaleProductService to PointOfSaleItemService

[dangermattic]

Thanks for reporting! 👍