Enable attributed commit messages from within plugin

[ds1]

• Enable adding custom commit messages via GitFig plugin
• Attribute to GitHub user as author

Per user @mgz513:
"...there was no place for me to add my commit message in the GitFig plugin despite whats listed in the written instructions, and I dont see a way to change the commit in Github. Its imperative that I can make the proper commit message while in Figma, otherwise PRs will get messy quickly! Having an appendage, like the github user account name, added automatically to the end of each commit message would also be a great way to keep track of whose adding what."
#2 (reply in thread)

https://github.com/mgz513