Add close all other tabs shortcut

modules/nvim.nix

@@ -240,6 +240,12 @@
         action = ":bp|bd #<CR>";
         options = { desc = "Close current buffer"; };
       }
+      {
+        mode = "n";
+        key = "<leader>X";
+        action = ":lua close_other_buffers()<CR>";
+        options = { desc = "Close all buffers except current"; };
+      }
 
       # System integration
       {
@@ -317,6 +323,25 @@
         }
       }
 
+      -- Close all buffers except current (preserving NvimTree and other special buffers)
+      function close_other_buffers()
+        local current_buf = vim.api.nvim_get_current_buf()
+        local buffers = vim.api.nvim_list_bufs()
+        
+        for _, buf in ipairs(buffers) do
+          if buf ~= current_buf and vim.api.nvim_buf_is_valid(buf) then
+            local buftype = vim.api.nvim_buf_get_option(buf, 'buftype')
+            local filetype = vim.api.nvim_buf_get_option(buf, 'filetype')
+            
+            -- Skip special buffers (NvimTree, terminals, quickfix, etc.)
+            if buftype == "" and filetype ~= "NvimTree" then
+              -- Only delete if it's a normal file buffer
+              vim.api.nvim_buf_delete(buf, { force = false })
+            end
+          end
+        end
+      end
+
       -- Unicode-safe file operations
       function open_file_with_system_app()
         local filepath = vim.fn.expand('%:p')