Dev Command Console

[justinDeu]

Add a debug command console that can be activated with a key bind such as C-d which opens a text menu that allows for entering commands to cause behaviors on the system. Example commands inculde:

• sending a message from another user
• panic the program
• sending a message as yourself (simulating using another platform while chatty is open)

This should only be available in a development build of chatty and all functionality should be removed for a real build.

[justinDeu]

Would use #[cfg(debug_assertions)] to only include in development builds