Add fulltext search for posts and profiles (closes #340) (#342)

* Refactor mobile search screen

* Remove 'staleness' fetch trigger on search

* Implement a temporary fulltext search solution

* Add missing key from profile search result

* A few UI & UX improvements to the search suggestions

* Update web search suggestions

* Implement search in web build

src/view/com/search/Suggestions.tsx

@@ -0,0 +1,50 @@
+import React from 'react'
+import {StyleSheet, View} from 'react-native'
+import {observer} from 'mobx-react-lite'
+import {FoafsModel} from 'state/models/discovery/foafs'
+import {WhoToFollow} from 'view/com/discover/WhoToFollow'
+import {SuggestedFollows} from 'view/com/discover/SuggestedFollows'
+import {ProfileCardFeedLoadingPlaceholder} from 'view/com/util/LoadingPlaceholder'
+
+export const Suggestions = observer(({foafs}: {foafs: FoafsModel}) => {
+  if (foafs.isLoading) {
+    return <ProfileCardFeedLoadingPlaceholder />
+  }
+  if (foafs.hasContent) {
+    return (
+      <>
+        {foafs.popular.length > 0 && (
+          <View style={styles.suggestions}>
+            <SuggestedFollows
+              title="In your network"
+              suggestions={foafs.popular}
+            />
+          </View>
+        )}
+        <WhoToFollow />
+        {foafs.sources.map((source, i) => {
+          const item = foafs.foafs.get(source)
+          if (!item || item.follows.length === 0) {
+            return <View key={`sf-${item?.did || i}`} />
+          }
+          return (
+            <View key={`sf-${item.did}`} style={styles.suggestions}>
+              <SuggestedFollows
+                title={`Followed by ${item.displayName || item.handle}`}
+                suggestions={item.follows.slice(0, 10)}
+              />
+            </View>
+          )
+        })}
+      </>
+    )
+  }
+  return <WhoToFollow />
+})
+
+const styles = StyleSheet.create({
+  suggestions: {
+    marginTop: 10,
+    marginBottom: 20,
+  },
+})