Support for set background

[erlanger]

It is not changing the background when I run
:set background=light

I am looking for the same kind of look as when I run set background=light in neovim-gtk.

Thanks for a great project!
EDIT: running on alacritty

[beeender]

Hi! which color scheme are you using?
The set background should just work if the color scheme support true color.

[erlanger]

Just starting neovim without any specified color scheme. If I could just use my alacritty settings for bacground color it would work fine (but since you override the configuration all my settings are gone).

[beeender]

A quick workaround for now, using some true color support scheme.
I am using https://github.com/NLKNguyen/papercolor-theme which works fine with background switching.

For the future, I think glrnvim should define a standard color groups for every terminal, then those 16 colors vim schemes should work.

Also adding a use_user_conf might be useful. If that is true, glrnvim won't overwrite user's terminal conf.