feat: add plugins

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

nvim/lua/plugins/mason.lua

@@ -0,0 +1,23 @@
+-- mason.lua - LSP/DAP/格式化工具自动安装
+return {
+  {
+    "williamboman/mason.nvim",
+    build = ":MasonUpdate",
+    config = true,
+  },
+  {
+    "williamboman/mason-lspconfig.nvim",
+    dependencies = { "williamboman/mason.nvim" },
+    opts = {
+      ensure_installed = { "gopls", "pyright" },
+    },
+  },
+  {
+    "jay-babu/mason-null-ls.nvim",
+    dependencies = { "williamboman/mason.nvim", "nvimtools/none-ls.nvim" },
+    opts = {
+      ensure_installed = { "gofumpt", "golines", "black", "isort", "flake8" },
+      automatic_installation = true,
+    },
+  },
+}