Issue 405: Add ConfiguredTool; expand configuration to string-thing-nothing

[ajnelson-nist]

This Pull Request resolves all requirements of Issue #405 .

Coordination

• [x] Pull request is against correct branch
• [x] Pull Request is in, or reverted to, Draft status before Solutions Approval vote has passed.
• [x] CI passes in (CASE/UCO) feature branch
• [x] CI passes in (CASE/UCO) current unstable branch (2d77f00)
• [ ] CI passes in CASE current unstable branch tracking UCO's unstable as submodule (merge-commit)
• [x] Impact on SHACL validation reviewed for CASE-Examples
• [x] Impact on SHACL validation remediated for CASE-Examples
• [x] Impact on SHACL validation reviewed for casework.github.io
• [x] Impact on SHACL validation remediated for casework.github.io (N/A)
• [ ] Solutions Approval vote logged on corresponding Issue (once logged, can be taken out of Draft PR status)

[ajnelson-nist]

Converting to Draft until Solutions Approval vote is logged.

[ajnelson-nist]

Superseded by PR 455. I'm going to leave this PR open in case closing this would confuse Github's PR system. Merging PR 455 should "Merge" this PR as well.