Pen/Freehand/Splines tool should set its origin to the first drawn point location when the new layer is created

[timon-schelling]

Right now, the origin gets set to the parent (usually canvas) origin which is often far away from where the user is drawing. At least we know that, when drawing a shape and its layer gets created, the user likely has an interest in a particular area in space roughly nearby the first point being drawn. So that's the better choice. This means adding a Transform node to provide the offset to the first point location.

The Data panel, opened from the menu bar's Window > Data, will be helpful in the implementation process.

original: GraphiteEditor#2776

[timon-schelling]

Take a look at contributors guide: https://graphite.rs/volunteer/guide/

[watermelon-neko]

I'd like to work on this issue

[watermelon-neko]

try to impl it, is this desired result?