Make setting an uninstalled version in TUI friendlier
How about instead of saying this:
Error: The version "1.2.0" of the tool "HLS" is not installed.
Press enter to continue
ghcup would just install the thing or at least say something like
The version "1.2.0" of the tool "HLS" is not installed.
Do you want to install it now? [Y/n]