Recommend new users use the repo as a template instead of as a fork

[stephansama]

currently the recommended installation step is to fork the repo and then continue from there "kickstarting" your configuration. i think it would make more sense if the repo was converted into a template (similar to neovim-plugin-boilerplate) that way users do not get "out of sync" with something that they should only have used as a starting point.

https://github.com/nvim-lua/kickstart.nvim?tab=readme-ov-file#recommended-step