Pencil support for handwritten notes to files

First I want to say I fully realise this suggestion is a bit on the crazy side, but here it goes:

I use my ipad more often to review code rather than to write it (for which I only use the ipad when I’m traveling). For this I use textastic just because the color scheme makes things easier for me, I usually have Notes open on the side a well in case I need to take notes

It would be great to have this feature included within Textastic, I can imagine writing comments into particular lines which are saved maybe as a reference to that particular line in that particular file?

Cheers!

J