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/lib/hooks/usePalette.ts

@@ -4,6 +4,7 @@ import {useTheme, PaletteColorName, PaletteColor} from '../ThemeContext'
 export interface UsePaletteValue {
   colors: PaletteColor
   view: ViewStyle
+  viewLight: ViewStyle
   btn: ViewStyle
   border: ViewStyle
   borderDark: ViewStyle
@@ -20,6 +21,9 @@ export function usePalette(color: PaletteColorName): UsePaletteValue {
     view: {
       backgroundColor: palette.background,
     },
+    viewLight: {
+      backgroundColor: palette.backgroundLight,
+    },
     btn: {
       backgroundColor: palette.backgroundLight,
     },