nvim: add treesj (for toggle one-line)

nvim/.config/nvim/lua/plugins/init.lua

@@ -19,5 +19,16 @@ return {
   {
     "folke/trouble.nvim",
     dependencies = { "nvim-tree/nvim-web-devicons" },
-  }
+  },
+
+  {
+    'Wansmer/treesj',
+    dependencies = { 'nvim-treesitter/nvim-treesitter' },
+    config = function()
+      local tsj = require('treesj')
+      tsj.setup({
+        vim.keymap.set('n', '<leader>T', tsj.toggle, { desc = "[T]oggle one-line" }),
+      })
+    end,
+  },
 }