docs: add avatar tooltip to example app

Author: pac-guerreiro

example/src/Examples/TooltipExample.tsx

@@ -4,6 +4,7 @@ import { Platform, StyleSheet } from 'react-native';
 import type { StackNavigationProp } from '@react-navigation/stack';
 import {
   Appbar,
+  Avatar,
   Banner,
   FAB,
   List,
@@ -35,6 +36,9 @@ const TooltipExample = ({ navigation }: Props) => {
           <Tooltip title="Search">
             <Appbar.Action icon="magnify" onPress={() => {}} />
           </Tooltip>
+          <Tooltip title="Username">
+            <Avatar.Text size={24} label="U" />
+          </Tooltip>
           <Tooltip title="More options">
             <Appbar.Action icon={MORE_ICON} onPress={() => {}} />
           </Tooltip>