neovim: set random colorscheme on each start

neovim/.config/nvim/after/plugin/theme.lua

@@ -2,7 +2,11 @@ vim.api.nvim_set_hl(0, "SpellBad", {
   fg = "red",
 })
 
+local colorschemes = { "gruvbox-material", "material" }
+local random_colorscheme = colorschemes[math.random(#colorschemes)]
+
+vim.cmd("colorscheme " .. random_colorscheme)
+
 vim.cmd([[
-colorscheme gruvbox-material
 hi clear SignColumn
 ]])