feat: add plugins

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

nvim/lua/plugins/null-ls.lua

@@ -0,0 +1,21 @@
+-- null-ls.lua - 格式化与诊断
+return {
+  {
+    "nvimtools/none-ls.nvim",
+    event = { "BufReadPre", "BufNewFile" },
+    opts = function()
+      local null_ls = require("null-ls")
+      return {
+        sources = {
+          -- Go
+          null_ls.builtins.formatting.gofumpt,
+          null_ls.builtins.formatting.golines,
+          -- Python
+          null_ls.builtins.formatting.black,
+          null_ls.builtins.formatting.isort,
+          null_ls.builtins.diagnostics.ruff,
+        },
+      }
+    end,
+  },
+}