Feature request: hatch config unset

[jpgoldberg]

There does not appear to be a mechanism other than finding and editing the config file to remove a configuration field. I suggest that an unset command be added to hatch config.

To illustrate the current behavior:

% hatch config set typo
Value for `typo`: some valule
New setting:
typo = "some valule"
% hatch config set typo
Value for `typo`: ""
New setting:
typo = "\"\""
% hatch config set typo
Value for `typo`: 
Value for `typo`: 
Value for `typo`: remove this
New setting:
typo = "remove this"
% hatch config unset typo
Usage: hatch config [OPTIONS] COMMAND [ARGS]...
Try 'hatch config -h' for help.

Error: No such command 'unset'.