Add relevant information for different types of organization

VCARD allows contact cards to be about two types of thing: Individual, and Organization. Organization there covers all kinds of things -- for profit and non-profit, on what sort of organization, and parts of them, like and unofficial things like sports teams and rock bands. https://schema.org/Oraganization mentions some subclasses.

Some classes of large "important' organization have data about them in public data bases, and so it is wise to link to that to be able to query for eg people who went to the same school, etc. Where that exists, some data can be pulled from those databases.

Interesting cases are organizations which re part of the developer workflow, like github and gitlab organization.

As we build up the capacity in Solid to do things around project management and software management, then increasingly the creation of a new Organization could be an easy way to start using ever more powerful tools for running that organization.

No files, tests, or entry points are named. Start by reviewing how VCARD organizations are represented and comparing the proposed cases with schema.org Organization subclasses; done means defining a decided scope for organization types, relevant public-data links, and supported organization-specific information.