fix: set mode for all keymaps

config/keymaps/splits.nix

@@ -2,41 +2,49 @@
 # https://github.com/AstroNvim/AstroNvim/blob/v4.7.7/lua/astronvim/plugins/_astrocore_mappings.lua#L107-L114
 [
   {
+    mode = "n";
     key = "<C-H>";
     action = "<C-w>h";
     options.desc = "Move to left split";
   }
   {
+    mode = "n";
     key = "<C-J>";
     action = "<C-w>j";
     options.desc = "Move to below split";
   }
   {
+    mode = "n";
     key = "<C-K>";
     action = "<C-w>k";
     options.desc = "Move to above split";
   }
   {
+    mode = "n";
     key = "<C-L>";
     action = "<C-w>l";
     options.desc = "Move to right split";
   }
   {
+    mode = "n";
     key = "<C-Up>";
     action = "<Cmd>resize -2<CR>";
     options.desc = "Resize split up";
   }
   {
+    mode = "n";
     key = "<C-Down>";
     action = "<Cmd>resize +2<CR>";
     options.desc = "Resize split down";
   }
   {
+    mode = "n";
     key = "<C-Left>";
     action = "<Cmd>vertical resize -2<CR>";
     options.desc = "Resize split left";
   }
   {
+    mode = "n";
     key = "<C-Right>";
     action = "<Cmd>vertical resize +2<CR>";
     options.desc = "Resize split right";