Apps-Script-Gmail-Push-Notifications | rough example on how to get push notification | Notification library

I'm trying to make an inbox-listener element to automatically pull message content with a specific subject line into a Google Spreadsheet for reporting. I'm hoping this GitHub Project will do the trick, and I've made the Google Appscript project that should handle it. Part of the process is to verify the project ownership by publishing it as draft on the Chrome web store. According to Google's documentation, that should be under the publish function, but I don't see it there, or anywhere in the script editor. Could anyone tell me what I'm doing wrong, or if this feature is disabled?

Here is what the menu looks like in my IDE.

GAS Code

main.gs