style: add Monokai Charcoal colorscheme

lua/plugins.lua

@@ -27,6 +27,7 @@ local plugins = {
             vim.cmd("colorscheme hardhacker")
         end,
     },
+    { "arkorty/monokai.nvim" },
     { "ellisonleao/gruvbox.nvim", priority = 1000, config = true },
     {
         "navarasu/onedark.nvim",

lua/setup/colorscheme.lua

@@ -1,8 +1,8 @@
-local ok, _ = pcall(require, "gruvbox")
+local ok, _ = pcall(require, "monokai")
 if not ok then
     return
 end
 
 -- setup must be called before loading
 vim.opt.termguicolors = true
-vim.cmd.colorscheme("gruvbox")
+vim.cmd.colorscheme("monokai_charcoal")