docs: ionic serve vs ng serve

[rajinder-yadav]

The document doesn't explain what is so different between using 'ionic serve' vs 'ng serve'. If there is no difference, can you please just consider getting rid of 'ionic serve' for angular applications?

I find typing 'ng s' a lot quicker and easy. However having a different way, to start an ionic + angular app leaves room for confusion. As if the it's doing something extra, which again the document fails to detail.