Support nrwl/nx

[mostafa8026]

I think it would be useful to support nrwl/nx plugin schema. this link explains how to add ng-add schema that compatible with nx.
I'm currently add tailwind to nx projects in a tedious way explained here

[marcjulian]

hi @mostafa8026 it worked out of the box with angular 11. Not sure if it works with 12 or 13.
If you like you can contribute with a PR to add the support if necessary.