theme：主题更换。

lua/plugins/theme.lua

@@ -1,13 +1,11 @@
 return {
-    "projekt0n/github-nvim-theme",
-    name = "github-theme",
-    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
+    "sainnhe/everforest",
+    lazy = false,
+    priority = 1000,
     config = function()
-        require("github-theme").setup({
-            -- ...
-        })
-
-        vim.cmd("colorscheme github_dark_dimmed")
+        -- Optionally configure and load the colorscheme
+        -- directly inside the plugin declaration.
+        vim.g.everforest_enable_italic = true
+        vim.cmd.colorscheme("everforest")
     end,
 }