refactor + add some QoL plugins

config/keymaps.nix

@@ -11,7 +11,7 @@
       };
     }
 
-    { # prefix: find
+    {
       mode = ["n"];
       key = "<leader>f";
       action = "<NOP>";
@@ -19,5 +19,32 @@
         desc = "+find"; 
       };
     }
+
+    {
+      mode = ["n"];
+      key = "<PageUp>";
+      action = "<C-u>";
+      options = {
+        silent = true;
+      };
+    }
+
+    {
+      mode = ["n"];
+      key = "<PageDown>";
+      action = "<C-d>";
+      options = {
+        silent = true;
+      };
+    }
+
+    {
+      mode = ["n"];
+      key = "<Del>";
+      action = "zz";
+      options = {
+        silent = true;
+      };
+    }
   ];
 }