MINI now has its own site

Hello, Neovim users! For the entirety of the ‘mini.nvim’/MINI project its main place of documentation was GitHub. It means that “official” links to module READMEs and help files were something like https://github.com/nvim-mini/mini.nvim/blob/main/readmes/mini-ai.md and https://github.com/nvim-mini/mini.nvim/blob/126ce3328c78399dcff58272f6f540a373b62a75/doc/mini-ai.txt#L1 . But not any more! Please…