Add GroupInfo

mesh.proto

@@ -887,6 +887,14 @@ enum CriticalErrorCode {
   RadioSpiBug = 11;
 }
 
+/*
+ * GroupInfo for group chats like #FoodFreaks and #CoolPeopleOnly
+ */
+message GroupInfo {
+  repeated string group = 1 [(nanopb).max_length = 16, (nanopb).max_count = 10];
+}
+
+
 /*
  * Unique local debugging info for this node
  * Note: we don't include position or the user info, because that will come in the