- Adds Basic Support for Communities (172)

- Adds Community discovery screens
- Adds Public Chat discovery
- Adds Community Follow/Unfollow
- Renders Community Posts in feed
- Creates a summary of verified participants in Communities/Chats/Streams
- Restructures Hashtag Screen to the new Screen Building structure
- Remembers scroll position in Live, Community and Chat discovery

app/src/main/res/values/strings.xml

@@ -472,4 +472,8 @@
     <string name="followed_tags">Followed Tags</string>
 
     <string name="relay_setup">Relays</string>
+
+    <string name="discover_live">Live</string>
+    <string name="discover_community">Communities</string>
+    <string name="discover_chat">Chats Groups</string>
 </resources>