Coding Matrix in Rust | 2023-07-10

This time: * Working on finding out our Matrix username, which is surprisingly difficult because the plugins are a long way away from the matrix-connecting parts. * Managed to set up a 2-way request-response channel for the plugin to talk to the bot framework. Next time: * Figure out why my test failed with a stack overflow! * Actually respond to the request for our username in the bot.