Add nvim-ufo as an option

[glmlm]

It is really annoying for me to set the foldings every time I open a file, so I have looked for a plugin that set them automatically like VSCode; nvim-ufo and added it.

I understand that adding this is controversial, especially from a "kickstart" perspective, but I think it is worth adding them if only as an option.

I often use this feature when coding to hide parts of the code that I don't need to see, and I personally believe it would be inconvenient for VSCode users to be without them when they first touch Neovim. Howerver, I think the opinion that there is no need to bother putting it in lua/kickstart/plugins if there seems to be no demand for it from many users should also be respected.

I would appreciate your thoughts on this.