feat: replace buffer plugin with leader maps

config/keymaps.nix

@@ -10,5 +10,41 @@
         silent = true;
       };
     }
+
+    { # buffer prefix
+      mode = "n";
+      key = "<leader>b";
+      action = "<Nop>";
+      options = {
+        desc = "+buffer";
+      };
+    }
+
+    { # goto next buffer
+      mode = ["n"];
+      key = "<leader>bn";
+      action = ":bnext<cr>";
+      options = {
+        silent = true;
+      };
+    }
+
+    { # goto previous buffer
+      mode = ["n"];
+      key = "<leader>bp";
+      action = ":bprevious<cr>";
+      options = {
+        silent = true;
+      };
+    }
+
+    { # delete buffer
+      mode = ["n"];
+      key = "<leader>bd";
+      action = ":bdelete<cr>";
+      options = {
+        silent = true;
+      };
+    }
   ];
 }