Tclear may not rely on keybindings

[strboul]

Describe the bug
I have a keybinding in my zsh that <c-l> is mapped to ls. So when I call it, my files in the directory are listed.
:Tclear may instead execute the clear command in the shell but it should use <c-l> for the REPLs. I am not sure because this may be too complicated.

Versions

• OS: macOS
• neoterm commit sha1: 65fbb0e
• Vim or Neovim
  • Vim
  • Neovim
• Version [nvim --version]: NVIM v0.3.8

Additional context
neoterm is just amazing and made me very excited about the vim again. Thanks a lot for the plugin! ❤️

[kassio]

Added g:neoterm_clear_cmd to configure how to clear the terminal.

Thanks for the issue.