Added navigation to application, internationalization, and sign in screen.

components/screen-messaging-list/screen-messaging-list.component.jsx

@@ -0,0 +1,10 @@
+import React from "react";
+import { View, Text } from "react-native";
+
+export default function ScreenMessagingList() {
+  return (
+    <View>
+      <Text>A list of conversations.</Text>
+    </View>
+  );
+}