Improved keyboard input method (support for arrow keys, enter for new line)

[nebbles]

New interface.

Additional resources

• https://stackoverflow.com/questions/45022566/create-python-cli-with-select-interface
• https://docs.python.org/3/library/cmd.html
• https://github.com/commitizen/cz-cli

[nebbles]

• https://github.com/tmbo/questionary
• https://python-prompt-toolkit.readthedocs.io/en/master/pages/getting_started.html

[nebbles]

https://github.com/prompt-toolkit/python-prompt-toolkit

[nebbles]

Arrow keys and standard text navigation implemented in 187780d