Add UI for browsing full model content

[cdmgtri]

Create a user interface that allows users to browse the contents of NIEM community database, including the NIEM reference model.

Requirements

Stewards (optional entry point):

• Display list of all stewards
• Display details about selected steward
• Display steward's model list

Models (optional entry point):

• Display list of models
• Display details about selected models
• Display list of versions for the model

Versions

• Display details about selected version
• Display list of version's namespaces

Namespaces

• Display details about selected namespace
• Display list of namespace's properties
• Display list of namespace's types
• Display local terminology

Properties

• Display details about selected property
• Display substitution group if present
• Display sub-properties if present
• Display literal type if present
• Display codes and other facets if present

Types

• Display details about selected type
• Display base type
• Display list of properties of this type
• Display sub-properties if present
• Display literal type if present
• Display codes and other facets if present

Other requirements

• Use human-readable URLs with a predictable format
• Use pagination for long property, type, and facet lists
• Display a not found error message for invalid URLs and walk up to the nearest match
• Display lineage links (items from previous and next versions)
• Support easy copying of common fields (e.g., names, defs, urls) to the clipboard