uses tab based completion

modules/nixvim/completion.nix

@@ -3,19 +3,24 @@
     enable = true;
     settings = {
       keymap = {
-        preset = "default";
+        preset = "enter";
-      };
+        "<Tab>" = [
-      appearance = {
+          "select_next"
-        nerd_font_variant = "mono";
+          "fallback"
-      };
+        ];
-      completion = {
+        "<S-Tab>" = [
-        documentation = {
+          "select_prev"
-          auto_show = false;
+          "fallback"
-        };
+        ];
-      };
+        "<C-k>" = [
-      signature = {
+          "show_documentation"
-        enabled = true;
+          "hide_documentation"
+        ];
       };
+      appearance.nerd_font_variant = "mono";
+      completion.documentation.auto_show = false;
+      signature.enabled = true;
+      cmdline.completion.menu.auto_show = true;
     };
   };
 }