Add floating Button

screens/MainScreen.js

@@ -1,10 +1,13 @@
 import { StatusBar } from "expo-status-bar";
 import { Text, View, StyleSheet } from "react-native";
 
+import FloatingButton from "../components/FloatingButton";
+
 function MainScreen() {
   return (
     <View style={styles.container}>
       <Text>Open up App.js to start working on your app!</Text>
+      <FloatingButton />
       <StatusBar style="auto" />
     </View>
   );