Add custom feeds selector, rework search, simplify onboarding (#325)

* Get home screen's swipable pager working with the drawer

* Add tab bar to pager

* Implement popular & following views on home screen

* Visual tune-up

* Move the feed selector to the footer

* Fix to 'new posts' poll

* Add the view header as a feed item

* Use the native driver on the tabbar indicator to improve perf

* Reduce home polling to the currently active page; also reuse some code

* Add soft reset on tap selected in tab bar

* Remove explicit 'onboarding' flow

* Choose good stuff based on service

* Add foaf-based follow discovery

* Fall back to who to follow

* Fix backgrounds

* Switch to the off-spec goodstuff route

* 1.8

* Fix for dev & staging

* Swap the tab bar items and rename suggested to what's hot

* Go to whats-hot by default if you have no follows

* Implement pager and tabbar for desktop web

* Pin deps to make expo happy

* Add language filtering to goodstuff

src/App.native.tsx

@@ -4,8 +4,10 @@ import {Linking} from 'react-native'
 import {RootSiblingParent} from 'react-native-root-siblings'
 import SplashScreen from 'react-native-splash-screen'
 import {SafeAreaProvider} from 'react-native-safe-area-context'
+import {GestureHandlerRootView} from 'react-native-gesture-handler'
 import {observer} from 'mobx-react-lite'
 import {ThemeProvider} from 'lib/ThemeContext'
+import {s} from 'lib/styles'
 import * as view from './view/index'
 import {RootStoreModel, setupState, RootStoreProvider} from './state'
 import {Shell} from './view/shell'
@@ -51,9 +53,11 @@ const App = observer(() => {
       <RootSiblingParent>
         <analytics.Provider>
           <RootStoreProvider value={rootStore}>
-            <SafeAreaProvider>
-              <Shell />
-            </SafeAreaProvider>
+            <GestureHandlerRootView style={s.h100pct}>
+              <SafeAreaProvider>
+                <Shell />
+              </SafeAreaProvider>
+            </GestureHandlerRootView>
           </RootStoreProvider>
         </analytics.Provider>
       </RootSiblingParent>