Switch TUI to Alternative Library?

[thw26]

https://github.com/urwid/urwid

The current TUI is in progress of creating a high level curses/dialog API. Switching to urwid would let us drop tui_screen.py, tui_curses.py, and tui_dialog.py, and it would also let us drastically simplify tui_app.py and likely launching the TUI app from main.py.

This would in turn reduce our custom code maintenance but introduce another project as a dependency.

I believe this transition would be worth the effort, particularly surrounding our desires in #147 and in #206.

[thw26]

My tests so far have much functionality in place, except for choosing the install directory. This will require more work on my part to get right.

[thw26]

cf. https://click.palletsprojects.com/en/stable/

[thw26]

This is particularly driven by a desire for a file browser in path selection. Here's another example:

https://gitlab.com/tripcodeq7/xplore_file_browser

Here's one using Uni-Curses. Can we port it?

https://github.com/GiorgosXou/TUIFIManager

Here's another:

https://gist.github.com/rygwdn/394885 and a later fork: https://gist.github.com/scionsamurai/3974ee1b185f2eb3d20a8fd22ac50d4c

[thw26]

I think #199 would be a better solution. Closing.