nvim: add lupanbones colorscheme (my variant for zenbones)

- also add lupanbones colors for kitty and st
- remove zutty config

nvim/.config/nvim/lua/plugins/colorscheme.lua

@@ -2,8 +2,10 @@ vim.pack.add({
 	"https://github.com/EdenEast/nightfox.nvim",
 	"https://github.com/rebelot/kanagawa.nvim",
 	"https://github.com/kepano/flexoki-neovim",
+	"https://github.com/rktjmp/lush.nvim",
+	"https://github.com/zenbones-theme/zenbones.nvim",
 })
 
 local cs = require("config.colorscheme")
-cs.set_colorschemes("flexoki", "flexoki")
+cs.set_colorschemes("lupanbones", "lupanbones")
 cs.update_colorscheme()