Add formating and linting support.

home-manager/modules/nvim.nix

@@ -52,7 +52,23 @@
     extraConfigLuaPost = ''
       vim.notify = require("mini.notify").make_notify()
     '';
+    extraPackages = with pkgs; [ stylua isort black nixfmt ];
     plugins = {
+      conform-nvim = {
+        enable = true;
+        formattersByFt = {
+          lua = [ "stylua" ];
+          python = [ "isort" "black" ];
+          nix = [ "nixfmt" ];
+        };
+      };
+      lint = {
+        enable = true;
+        lintersByFt = {
+          python = [ "mypy" ];
+          ruby = [ "ruby" ];
+        };
+      };
       harpoon = {
         enable = true;
         keymaps = {