[lib/native/web] add user edit icon to comm icon pack

Summary: Added user-edit icon to the comm icons pack. These changes were copy and pasted from Iconmoon. I also added the new icon to our dropbox for an easy visual reference

Test Plan:
Please see the screenshots below. (The minor visual differences in web/native (the color/size) are just due to different props being used in the CommIcon component in web vs native. There is no visual difference with the actual icon)

Native:

Web:

Reviewers: atul, rohan

Reviewed By: rohan

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D8467