chore: move dashboard to a standard thread

This is preparation for `tachyonfx`:

- `ratatui` continues to be painful to use with
  cargo. `tachyonfx` is on the latest version, so
  this bumps everything to the latest version.
  Because some libs don't have releases on that
  version yet, this uses forks until they release
  new versions.
- `tachyonfx` effects are not `Send` because the
  shaders are using `Rc<RefCell<T>>` for some
  operations. This moves the dashboard rendering
  thread to its own *actual* thread with a
  separate tokio runtime to get around the `Send`
  requirement for the futures.

Author: grampelberg