[Woo POS] UI: Dashboard wireframe

[iamgabrielma]

Ref: TfaZ4LUkEwEGrxfnEFzvJj-fi-6_1657

The dashboard should have the following UI components, all of them non-functional at the moment:

• [ ] A custom navigation top bar with 3 toolbar items
• [ ] Product list view
• [ ] Cart view
• [ ] Search field view
• [ ] Filter field view
• [ ] Product card view
• [ ] Product row view
• [ ] Checkout button

Ideally let's apply the colors from a common extension to Color, as we do through WooFoundation now for WooCommerce through Color.withColorStudio(). This can be tackled separately: https://github.com/woocommerce/woocommerce-ios/issues/12702

[dangermattic]

Thanks for reporting! 👍