Toggle Float

I noted that dont have some way to hidden and show the float, without need of go to manager mode and press Esc to hidden.

Add toggle keymap to show/hidden the float without need to manager to do it.

I "solved" it doing it:

  vim.keymap.set('t', '<M-c>', function ()
    -- pcall dont show errors (remove it if you when get the error in runtime)
    pcall(function () vim.cmd(':close') end)
  end)

[dmolin]

It's already handled by nvim-luxterm: when in terminal mode, the default shortcut for this is