[docs] Improve the design documentation to allow the the iteration on the project.

[jpower432]

What is the problem you're trying to solve
The design documentation needs to be updated and improve with the addition of diagrams and how to use certain types. It also need information on overall design, scope, and goals, of the CLI.

Describe the solution you'd like
Update the documentation

Additional context
Outcomes - Add enough design information to help new contributor get started.

Acceptance Criteria

• Normalize attribution statement and comments
• Frame emporous-go as a opinionated authoring tools for publishing information into the UOR data model
• Update the collection-spec with the new data model @afflom
• Point documentation to new collection spec
• High-level design in docs
• Add package level README.md for types and methods In Progress