Add indent_line and which_key plugins to nixvim

modules/home-manager/nixvim.nix

@@ -86,6 +86,8 @@
       };
     };
 
+    plugins.indent-blankline.enable = true;
+
     plugins.lualine = {
       enable = true;
       settings = {
@@ -98,6 +100,14 @@
       };
     };
 
+    plugins.which-key = {
+      enable = true;
+      lazyLoad = {
+        enable = true;
+	settings.event = "VimEnter";
+      };
+    };
+
     extraPlugins = with pkgs.vimPlugins; [
       vim-sleuth
     ];