Add responsive design

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/app.tsx

@@ -1,4 +1,4 @@
-import React, { JSX } from 'react';
+import React from 'react';
 import { StatusBar, useColorScheme } from 'react-native';
 import { PaperProvider } from 'react-native-paper';
 import { SafeAreaProvider } from 'react-native-safe-area-context';
@@ -8,7 +8,7 @@ import { Meme, Tag } from './database';
 import NavigationContainer from './navigation';
 import { SettingsProvider } from './contexts/settings';
 
-function App(): JSX.Element {
+function App() {
   const colorScheme = useColorScheme();
   const isDarkMode = colorScheme === 'dark';
   const theme = isDarkMode ? darkTheme : lightTheme;