Import Collections Ontology and test co:List features

[ajnelson-nist]

This Pull Request resolves all requirements of Issue 389.

Review steps taken:

• [x] Pull request is against correct branch
• [x] CI passes in (CASE/UCO) feature branch
• [x] CI passes in (CASE/UCO) current unstable branch (merge-commit)
• [x] Impact on SHACL validation reviewed for CASE-Examples
• [x] Impact on SHACL validation remediated for CASE-Examples (N/A)
• [x] Impact on SHACL validation reviewed for casework.github.io
• [x] Impact on SHACL validation remediated for casework.github.io (N/A)
• [x] Impact on documentation rendering assessed
• [ ] Demonstrate usage in CASE-Examples JSON files (possibly including reconstructed_file.json)