Add tab autocomplete

[miile7]

Add a path autocomplete when pressing tab.

[miile7]

(Maybe) helpful links:

• https://python-prompt-toolkit.readthedocs.io/en/master/pages/asking_for_input.html#autocompletion
• https://pypi.org/project/tabCompletion/
• pynput together with https://stackoverflow.com/a/53210441/5934316
• https://docs.python.org/3.5/library/curses.html
• https://pypi.org/project/readchar/