Artefacts Page tables need to present more information

[grahamegrieve]

The summary table found at http://hl7.org/fhir/extensions/extension-registry.html is way more useful than the frustrating table found in other igs, such as here: https://build.fhir.org/ig/HL7/sdc/artifacts.html#structures-extension-definitions

[lmckenzi]

Will update the 'default' behavior to show the artifact id and standards status and FMM
Will try an approach where the description appears on a second line, which we think will result in much less wrapping.
We will also define 'special' behavior for groups whose ids start with one of our pre-defined "special" group ids. Specifically:

• extensions - show cardinality, type, context
• examples - show profile they're examples of
• searchParameters - show type, base resource
• Profiles - show base model
• Valuesets - show code system(s), extensional vs. intensional
• ConceptMap - source & target value sets & code systems
• OperationDefinition - context

Can look at adding more 'special' types and columns in the future.

Might need updates to what's exposed in the ImplementationGuide to be able to populate some of this stuff - maybe need a resources.xml in addition to .json?