Support for vim.o.winborder

As there is no support for `vim.o.winborder` the native border makes the terminal title to be hidden: 

1. Set vim.o.winborder = true in neovim

Open the terminal: 

<img width="1385" height="781" alt="Image" src="https://github.com/user-attachments/assets/13f58b4b-eeca-424a-95c9-1c4745e617a5" />
