Update JADN Type Definition Description (Sect 3.1 & subs)

[dlemire60]

1. Update figure 3-2 to correct minor errors (this may need to be redrawn for a clearer image)
2. Add an overview of a JADN schema doc in section 3.1
3. Miscellaneous wording tweaks in section 3.1 and subsections
4. Describe use of minv / maxv for Binary, Integer, String types
5. Describe use of minf / maxf for Number types
6. Explain the constraints imposed by ipv4/6-net on Array types
7. Add new figure 3-3 with top-level structure of schema doc and renumber subsequent figures
8. Added CDDL reference info for f16/f32/f64 CBOR serialization types
9. Added PRs Minor updates to Music Library Database example #53-58 to the change record in Appendix C to capture recent work

[davaya]

I approve of the changes to the CN and info/types PNG.

The structure overlay will have to be changed later:

• Choice/Enumerated are union types, and Choice is either tagged (the kind we know and love with no options) or the new untagged (if oneOf, anyOf, and allOf options are included).
• UML collection options in table 7-1 are {sequence, set, orderedSet, bag} - sequence is new, orderedSet replaces unique and bag replaces unordered to align with UML. JIDL will still use "unique" for Array and "ordered" for Map/Record with the orderedSet type option.
• New inheritance options are {extends, restricts, and abstract} - currently undocumented and unimplemented, but they will go in JADN 1.1 along with untagged unions

I'm not sure the structure figure is helpful, but it can be included in this PR knowing that it will either be significantly updated or deleted. If it's helpful to some readers we should keep it.

In the software library I changed the "exports" info field name to "roots" to match what it is used for. "exports" is allowed as a synonym but is deprecated; new schemas should use roots, assuming the TC accepts the update to the CN and CS. I've started adding inheritance to the library but it isn't in a release yet.

[dlemire60]

I've added this PR to the 9 October working meeting agenda.

[dlemire60]

Approved for merging at 9 October working meeting