colortheme: change set method

we install 2 themes in themes.lua,
and then set colorscheme in init.lua

init.lua

@@ -2,3 +2,5 @@ require("configs.options")
 require("configs.keymaps")
 require("configs.autocmds")
 require("configs.lazy")
+
+vim.cmd.colorscheme("catppuccin")

lua/plugins/themes.lua

@@ -1,9 +1,14 @@
-return {{
+return {
+    -- tokyonight
+    {
         "folke/tokyonight.nvim",
-    lazy = false, -- make sure we load this during startup if it is your main colorscheme
-    priority = 1000, -- make sure to load this before all the other start plugins
-    config = function()
-        -- load the colorscheme here
-        vim.cmd([[colorscheme tokyonight]])
-    end
-}}
+        lazy = true,
+        opts = { style = "moon" },
+    },
+    -- catppuccin
+    {
+        "catppuccin/nvim",
+        lazy = true,
+        name = "catppuccin",
+    },
+}