demicolon.nvim: overload ; and , keys to also repeat jumps to diagnostics and text-objects

Hi everyone! I've created a new Neovim plugin: demicolon.nvim. It lets you use ; and , keys to not only repeat t/T/f/F motions, but also to repeat diagnostic motions like ]w (jump to next warning) as well as jumps to nvim-treesitter-textobjects like ]f (jump to next function).