This ext implements packspec support.
https://github.com/neovim/packspec
NOTE: dependencies are only supported.
https://github.com/vim-denops/denops.vim
https://github.com/Shougo/dpp.vim
const [context, options] = await args.contextBuilder.get(args.denops);
const packspecPlugins = await args.dpp.extAction(
args.denops,
context,
options,
"packspec",
"load",
{
basePath,
plugins,
},
) as Plugin[] | undefined;