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

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

@@ -0,0 +1,12 @@
+import React from "react";
+import { View, Text } from "react-native";
+import { useTranslation } from "react-i18next";
+export default function ScreenJobList({ navigation }) {
+  const { t } = useTranslation();
+  return (
+    <View>
+      <Text>This is the Job List.</Text>
+      <Text>{t("joblist.labels.activejobs")}</Text>
+    </View>
+  );
+}