Add markdown support to vim
diff --git a/modules/neovim/markdown/default.nix b/modules/neovim/markdown/default.nix
new file mode 100644
index 0000000..fb7e2a0
--- /dev/null
+++ b/modules/neovim/markdown/default.nix
@@ -0,0 +1,11 @@
+{pkgs, ...}: {
+  programs.neovim = {
+    plugins = with pkgs.vimPlugins; [
+      vim-markdown
+      ncm2-markdown-subscope
+      tabular
+      markdown-preview-nvim
+    ];
+    extraConfig = builtins.readFile ./markdown.vim;
+  };
+}