refactor: theme based on the system preference

lua/plugins/colorscheme.lua

@@ -8,7 +8,16 @@ return {
             neotree = true,
         },
         config = function()
-            vim.cmd.colorscheme("catppuccin-mocha")
+            local catppuccin = require("catppuccin")
+            catppuccin.setup({
+                flavour = "auto",
+                background = {
+                    dark = "mocha",
+                    light = "latte",
+                },
+                transparent_background = true,
+            })
+            vim.cmd.colorscheme("catppuccin")
         end,
     },
 }