open-legal-products brings workflow files into Mike's document backbone

The team has made workflow files first-class documents rather than a separate, awkward category. That means users can upload new versions, bring in saved files and open them through the same Office-compatible preview process used elsewhere in the product.

The accompanying interface work is practical rather than flashy: workflow authoring, prompt editing, table work and document controls have been tightened so they behave more consistently together. Add-ons also remain easy to bring in from the catalogue, with a clear per-item action and confirmation once the import finishes.