Be more explicit in GithubProject about the limit of items

[remyleone]

Could you add on the settings page of the project the limit of 1200 items? I just discovered it after spending a lot of time adding many issues. Having a gauge would have changed my behavior and added fewer items to my project board.

[rileybroughten]

This is great feedback to be more clear about item limits, will take this back to the team 👍