Change Vim 8 to Neovim 0.31

[Daya Adianto]

I'm going to procrastinate for a bit by replacing my Vim 8 installation to Neovim 0.31. 😅

Tasks

• Uninstall Vim 8
• Install Neovim 0.31
• Alias vim to actually call nvim
• Update .vimrc
• Check (and fix) existing plugins compatibility on Neovim