Nixvim: Enable formatters using conform.nvim

modules/programs/nixvim/_nixvim-config/plugins/formatter.nix

@@ -0,0 +1,15 @@
+{
+  plugins.conform-nvim = {
+    enable = true;
+    autoInstall.enable = true;
+    settings = {
+      formatters_by_ft = {
+        cpp = [ "clang_format" ];
+        markdown = [
+          "prettier"
+        ];
+      };
+      formatters = { };
+    };
+  };
+}