Add Lightline theme

[Nandax00]

Now using the defined palettes.

Modes:

Tabline:

[savq]

Looks good. Just a couple of questions:

• All the zeros are for cterm colors, right?
• Can lightline tell the difference between visual and block-visual?
• Could normal mode use a simpler gray color? I'm used to a very simple status line, but if other colorschemes use colors for normal node, then I guess it's fine.

I'd maybe swap visual and replace, so insert and replace both use warm colors.

[Nandax00]

* All the zeros are for `cterm` colors, right?

Yes, I didn't try to emulate these colors in cterm, probably a disclaimer would make sense.

• Can lightline tell the difference between visual and block-visual? No, Visual, V-Block, V-Line are all colored by s:p.visual
• Could normal mode use a simpler gray color? I'm used to a very simple status line, but if other colorschemes use colors for normal node, then I guess it's fine. I was using the gruvbox theme for a long time before I switched to melange, and so I tried to emulate the color choices of its status line here. Btw, most of the included themes have non-gray normal mode colors: https://github.com/itchyny/lightline.vim/blob/master/colorscheme.md . EDIT: I've just checked gruvbox, and it actually uses gray in Normal, so nevermind. Would you go then with gray or colored? I'd maybe swap visual and replace, so insert and replace both use warm colors.

I, personally, use the visual mode most often to select an arbitrary section, and then change that via c, so for me the stronger yellow color makes a lot of sense here. On the other hand, I never ever used Replace mode :D How about meeting in the middle: let's change "replace" to magenta?

[savq]

Ok. Then the changes I'd suggest are:

• Use light gray for normal mode.
• Use magenta for replace mode.
• Use green or cyan for command mode.

[Nandax00]

It's not possible to config the Command mode with Lightline, it seems. I've applied your other suggestions.

[savq]

Perfect. Thanks @Nandax00 for the PR!