feat: add plugins

Signed-off-by: d0zingcat <iamtangli42@gmail.com>

nvim/lua/plugins/treesitter.lua

@@ -0,0 +1,13 @@
+-- treesitter.lua - 语法高亮与代码结构
+return {
+  {
+    "nvim-treesitter/nvim-treesitter",
+    build = ":TSUpdate",
+    event = { "BufReadPost", "BufNewFile" },
+    opts = {
+      ensure_installed = { "go", "python", "lua", "json", "yaml", "markdown" },
+      highlight = { enable = true },
+      indent = { enable = true },
+    },
+  },
+}