* Move the input loop into a separate module
* Proof of concept implementation of command mode
* Update readme to reflect command mode
* Have Esc exit command mode
* Update tests to use command mode and make it transient by default
* Some merge fixes
* fix(tests): add missing COMMAND_TOGGLE and fix false positive test
* style(format): make rustfmt happy
* Update readme to describe command mode
Co-authored-by: Aram Drevekenin <aram@poor.dev>