Add basic keymaps to nixvim

modules/home-manager/nixvim.nix

@@ -40,5 +40,39 @@
 
       confirm = true;
     };
+
+    keymaps = [
+      {
+        mode = "n";
+	key = "<Esc>";
+	action = "<cmd>nohlsearch<CR>";
+	options.silent = true;
+      }
+
+      {
+        mode = "n";
+	key = "<C-h>";
+	action = "<C-w><C-h>";
+	options.desc = "Move focus to the left window";
+      }
+      {
+        mode = "n";
+	key = "<C-l>";
+	action = "<C-w><C-l>";
+	options.desc = "Move focus to the right window";
+      }
+      {
+        mode = "n";
+	key = "<C-k>";
+	action = "<C-w><C-k>";
+	options.desc = "Move focus to the upper window";
+      }
+      {
+        mode = "n";
+	key = "<C-j>";
+	action = "<C-w><C-j>";
+	options.desc = "Move focus to the lower window";
+      }
+    ];
   };
 }