Do conversations, along with way too much stuff. This implements conversations, along with all the memory management brouhaha that goes along with it. The conversation now lives directly on the handle rather than being a thing you have to get from it and then call manually. It Turns Out this makes things a lot easier! I guess we reorganized things again. For the last time. For real. I promise. This all passes ASAN, so it seems Pretty Good!

/target
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/Cargo.lock