Friends UI (#30)

* FriendsUI Button

* Created pending and current friend list screen

* end-to-end in progress

* Front End sever connection error

* Send friend request

* PendingFriends list

* Friend list major functionality completed

* Cancel Friend Request

* Friends networking vs.1 complete

* Conforms to PEP8

* tests added

* Added unit tests for new functions in networking

* PEP8 approved

* nit

* fix tests

* removed comment for linting

---------

Co-authored-by: Conor Powderly <powderlc@tcd.ie>
Co-authored-by: @shahapug <shahapug@tcd.ie>

Author: 3 people

client/App.js

@@ -7,6 +7,7 @@ import WeatherScreen from './Weather';
 import FindRouteScreen from './FindRoute';
 import DisplayRouteScreen from './DisplayRoute';
 import Dashboard from './SustainabilityDashboard'
+import FriendsScreen from './FriendsScreen'
 
 const Stack = createNativeStackNavigator();
 
@@ -20,6 +21,7 @@ export default function App() {
         <Stack.Screen name="FindRouteScreen" component={FindRouteScreen} />
         <Stack.Screen name="DisplayRouteScreen" component={DisplayRouteScreen} />
         <Stack.Screen name="Dashboard" component={Dashboard} />
+        <Stack.Screen name="FriendsScreen" component={FriendsScreen} />
       </Stack.Navigator>
     </NavigationContainer>
   );