nvim-config/lua/plugins/ufo.lua

return {
    "kevinhwang91/nvim-ufo",
    dependencies = "kevinhwang91/promise-async",
    lazy = false,
    config = function()
        -- Basic fold UI
        vim.o.foldcolumn = '1'
        vim.o.foldlevel = 99
        vim.o.foldlevelstart = 99
        vim.o.foldenable = true

        -- Triangles for folds
        vim.opt.fillchars = {
            foldopen = "▼",
            foldclose = "▶",
            foldsep = " ",
        }

        require("ufo").setup({
            provider_selector = function(bufnr, filetype, buftype)
                if filetype == "markdown" then
                    return { "treesitter", "indent" }
                end
                return { "lsp", "indent" }
            end,
        })
    end
}