feat(app-page-builder): add duplicate page list and bulk action

[leopuleo]

Changes

With this PR, we added "Duplicate page" as a bulk and list action.

The functionality was already existing in the page details drawer.

The feature is fully integrated with FLP (Folder Level Permissions) and is extensible/decoratable by third-party developers.

How Has This Been Tested?

Manually

Documentation

Inline documentation.