Collect material for software stories prototype

We need to collect examples and material for software stories. The shared document is here: https://hedgedoc.softwareheritage.org/ODfZz3OtT1mLcagPHLhf0g

Migrated from T3342 (view on Phabricator)

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information