Merge commit '94065a29c1c68ecf6aa0979a4c91f2616227f264' * commit '94065a29c1c68ecf6aa0979a4c91f2616227f264': docs: add images used in BT developer guide.
Merge commit '94065a29c1c68ecf6aa0979a4c91f2616227f264' * commit '94065a29c1c68ecf6aa0979a4c91f2616227f264': docs: add images used in BT developer guide.