Collapse/expand sections button

[Dananji]

Related issue: #645

https://github.com/user-attachments/assets/0ad0a41a-9e01-491c-89bb-a430be5c8667

When structures property has a root Range, it is rendered as a non-collapsible section as it contains all of the structure in the Manifest. e.g. from cookbook toc recipe;