Can someone suggest a library for doing what is done at 59 seconds ? https://youtu.be/14UwLG1jQwU?t=59 https://youtu.be/14UwLG1jQwU?t=59 I am looking for a li

Can someone suggest a library for doing what is done at 59 seconds ? https://youtu.be/14UwLG1jQwU?t=59 https://youtu.be/14UwLG1jQwU?t=59 I am looking for a library that lets me highlight a line of code and then comment on it. Similar to gerrit or other code review tools, but for my side project.