Add a command toggle-all-folds-for-change-views for toggling all folds on ChangeViews
Also, because it's adjacent, add a couple missing package.json declarations for the toggle-all-folds-in-change-section-at-point command added in this PR a couple years ago:
toggle-all-folds-for-change-viewsfor toggling all folds on ChangeViewstoggle-all-folds-in-change-section-at-pointcommand added in this PR a couple years ago: