Add "Recommended Next Steps"

After creating a new crate, guide the user by showing hints for what could be done next.

Examples
- Add your first entity
- Add some property to this entity (e.g. author on the dataset)
- Upload some files

Maybe similar to a quick start guide like in storybook and github?

No file or test entry point is named. Start by locating the interface shown immediately after a new crate is created, then review how Storybook- or GitHub-style onboarding could fit there; done means users see useful next-step hints covering entities, properties, and file uploads.

Written by the indexing model from the issue text.