Support for receiving formatted messages

Co-authored-by: Alvaro Carrasco <alvaro@signal.org>

protos/SignalService.proto

@@ -307,12 +307,22 @@ message DataMessage {
   }
 
   message BodyRange {
-    optional uint32 start  = 1;
+    enum Style {
+      NONE = 0;
+      BOLD = 1;
+      ITALIC = 2;
+      SPOILER = 3;
+      STRIKETHROUGH = 4;
+      MONOSPACE = 5;
+    }
+  
+    optional uint32 start = 1;
     optional uint32 length = 2;
-
-    // oneof associatedValue {
-      optional string mentionUuid = 3;
-    //}
+  
+    oneof associatedValue {
+      string mentionUuid = 3;
+      Style style = 4;
+    }
   }
 
   message GroupCallUpdate {
@@ -399,6 +409,7 @@ message StoryMessage {
     TextAttachment textAttachment = 4;
   }
   optional bool allowsReplies = 5;
+  repeated BodyRange bodyRanges = 6;
 }
 
 message TextAttachment {