Genie Code adds conversation controls

Genie Code now includes conversation controls that let you branch and revise a chat. You can fork a conversation into a new, independent thread from a point you choose, ask a quick side question with /btw without adding it to the thread, and edit an earlier message to regenerate the conversation from that point. When you want to revise a chat or try a different direction, Genie Code can branch it into a separate thread or edit it in place.