feat: Use streamer profile picture for shared chat badge (#5760)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>
Co-authored-by: Nerixyz <nerixdev@outlook.de>

src/providers/twitch/TwitchUser.cpp

@@ -18,6 +18,7 @@ void TwitchUser::update(const HelixUser &user) const
     assert(this->id == user.id);
     this->name = user.login;
     this->displayName = user.displayName;
+    this->profilePictureUrl = user.profileImageUrl;
 }
 
 }  // namespace chatterino