added custom configuration

lua/custom/plugins/catppuccin.lua

@@ -0,0 +1,13 @@
+return {
+  'catppuccin/nvim',
+  name = 'catppuccin',
+  priority = 1000,
+  opts = {},
+  config = function()
+    require('catppuccin').setup {}
+    vim.cmd.colorscheme 'catppuccin-macchiato'
+    vim.o.cursorline = true
+    vim.wo.signcolumn = 'auto'
+    vim.opt.termguicolors = true
+  end,
+}