Font Awesome already has a lot of useful icons for developing vector/svg editors.
It would be useful to have icons conveying stroke properties of vector elements.
Specifically, I'm suggesting icons for stroke cap type (butt, round, square/projecting), stroke corner/join type (round, bevel, miter), and stroke alignment type (center, inside, outside) such as those found in Adobe Illustrator or Affinity Designer.
The full list of icon names would be as follows: stroke-cap-butt, stroke-cap-round, stroke-cap-square, stroke-join-round, stroke-join-bevel, stroke-join-miter, stroke-align-center, stroke-align-inside, stroke-align-outside.
For reference, here are the relevant icons from Adobe Illustrator:

And those from Affinity Designer:
