Schema.org Blueprints Project - Update categories

Postponed until a new smaller list of Categories is finalized.

Updated the issue summary to reflect the recent change to reduce the number of Categories from 55 down to 19.

I'm working on this for #Portland2024

The current categories on the project page are :

1. Administration Tools
2. Content Editing Experience
3. Decoupled

I think SEO and Decoupled align better with the module according to the module's project page

- Decoupled: according to the project page the module provides APIs; for integration with a decoupled apps
- Search Engine Optimization (SEO): Exposing the content data to the Search engines is one of the primary features the module.

but I don't think that the Schema.org blueprint module is a good fit for Administrative tools category since the module does not seem to enhance the administrative experience in the current project (it might be relevant for the new schemadotorg_experimental project)

I'd advocate for these categories:

• Content Editing Experience - because standardized, consistent data structures can contribute to a streamlined authoring experience
• Search Engine Optimization (SEO) - structured data contributes to good SEO
• Site Structure - structured data is what it's all about

I agree with @bhogue on this. Modifying the Issue Summary to add
Site Structure - "Extend the structure of the site by way of content models, data storage, field types, and navigation, so it is more understandable to users" and mark RTBC

adjusted order of categories.