Add the ability to create shortcuts to commands

As a user I would like to have the opportunity to add shortcuts to the terminal that would run certain commands.

For instance if you ever used a terminal in macos there is this shortcut to clear the terminal, `cmd + K`. that clears the terminal in a different way than the linux terminal is cleared up with `ctrl + L`, with this shortcut we can still scroll up in the terminal history but with `cmd + K` you cant, is like a new terminal window/tab.

I personally just want to add that shortcut to `super + K` to the command `tput reset`. I think it is better to leave to the user the liberty to set this up however they want. But if you want to just implement the Shortcut that is fine as well, as long as it uses the `Super + K` for mac new comers it may get confusing.

Thanks,
Fernando

The issue names no files, tests, or entry points. Start by locating how terminal key events and user-configurable preferences are handled, then determine whether shortcuts should be fixed or configurable. Done means a shortcut can run a command and preserves the requested terminal-clearing behavior.

Written by the indexing model from the issue text.