update swift customization docs

docs/src/pages/[platform]/connected-components/liveness/customization/customization.i18n.swift.mdx

@@ -1 +1 @@
-Todo: Add internationalization info
+The text in the FaceLivenessDetectorView component is defined as string resources in the component's [Localizable.strings file](https://github.com/aws-amplify/amplify-ui-swift-liveness/blob/main/Sources/FaceLiveness/Resources/Base.lproj/Localizable.strings). These values can be translated/overwritten by following the instructions [here](https://developer.apple.com/documentation/xcode/localization).

docs/src/pages/[platform]/connected-components/liveness/customization/customization.start-view.swift.mdx

@@ -1 +1,20 @@
-Todo: Add description and example code for disabling the start view
+The FaceLivenessDetectorView contains an initial (start) view with instructions and information about the liveness check for the end user. By default, the start view is shown before the liveness check. The start view can be disabled, allowing you to provide your own start view before the FaceLivenessDetectorView component is displayed in the app:
+
+```swift
+FaceLivenessDetectorView(
+  sessionID: <session ID>,
+  region: <region>,
+  disableStartView: true,
+  isPresented: $isPresentingLiveness,
+  onCompletion: { result in
+    switch result {
+    case .success:
+      // ...
+    case .failure(let error):
+      // ...
+    default:
+      // ...
+    }
+  }
+)
+```