Built a tiny plugin to make design handoffs easier (Dev-Handoff Annotator) would love your feedback!

Hello everyone! I've built a small plugin called 'Dev-Handoff Annotator' to make measuring spacing and adding notes easier during design handoffs. I am a new developer, so I would really appreciate it if you could try it out and give me some feedback to improve it further.

Link: Dev-Handoff Annotator

Thanks!