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/view/screens/home/FeedsTabBar.web.tsx

@@ -0,0 +1,22 @@
+import React from 'react'
+import {observer} from 'mobx-react-lite'
+import {TabBar} from 'view/com/util/TabBar'
+import {CenteredView} from 'view/com/util/Views'
+import {RenderTabBarFnProps} from 'view/com/util/pager/Pager'
+import {usePalette} from 'lib/hooks/usePalette'
+
+export const FeedsTabBar = observer(
+  (props: RenderTabBarFnProps & {onPressSelected: () => void}) => {
+    const pal = usePalette('default')
+    return (
+      <CenteredView>
+        <TabBar
+          {...props}
+          items={['Following', "What's hot"]}
+          indicatorPosition="bottom"
+          indicatorColor={pal.colors.link}
+        />
+      </CenteredView>
+    )
+  },
+)