Coding Matrix in Rust | 2023-07-17

This time: - Attempt to allow plugins to talk to the bot, refactoring the JSON-based approach to a typed one - Briefly thought we were going to switch to sending messages similar to what we do already Next time: - Decide whether to carry on with this approach, using Arcs and Mutexes to wrap the bot, or ditch it - Maybe instead we should just call a method on the plugins telling them our username when we know it?