Feature to allow users to add comments at the pipeline level.
Context based on design inputs,
UI will show a “comment” button as part of the pipeline studio actions
Users can click the comments button to show/hide pipeline level comments
In the pipeline level comments pane, users should have a button that allows them to add new comments.
The comments are rendered the same way as plugin comments (and the container scrolls beyond 500px in height
This pane should also show comments added in older pipelines to support backward compatibility