Add ristretto theme to default themes (#384)

* Add ristretto theme to defaults

* Update alacritty.toml

themes/ristretto/neovim.lua

@@ -0,0 +1,22 @@
+return {
+	{
+		"gthelding/monokai-pro.nvim",
+		config = function()
+			require("monokai-pro").setup({
+				filter = "ristretto",
+				override = function()
+					return {
+						NonText = { fg = "#948a8b" },
+					}
+				end,
+			})
+			vim.cmd([[colorscheme monokai-pro]])
+		end,
+	},
+	{
+		"LazyVim/LazyVim",
+		opts = {
+			colorscheme = "monokai-pro",
+		},
+	},
+}