Add Light and Dark Variants

[sf1tzp]

I was messing around with Telescope's colorscheme switcher and found it really nice, but with how gruvbox is distributed currently, I could not find a nice way to directly switch to the light and dark variants (#297).

I'm not sure if this is best way to approach this problem (and I am very new to the neovim ecosystem, so forgive me if I missed something obvious) - but I found that this was a pretty straightforward method of implementing the schemes. Your thoughts?

Here's how it looks on my machine

[ellisonleao]

hey @sf1tzp thanks for the PR, however, I think this is a very edge-case scenario that you can probably achieve by creating your own personal command for it. Have you tried that approach?

[sf1tzp]

I did, but wasn't able to come up with something that worked how I wanted (eg :colorscheme gruvbox-light). I saw that other colorscheme plugins add variants like this, so I thought I would propose this here.

[sf1tzp]

Actually, apparently I didn't try adding exactly this to my nvim/colors 😅