Add build-run-app and unit-test-coverage CI tasks

[thnkslprpt]

Checklist

• I reviewed the Contributing Guide.
• I performed a cursory search to see if the bug report is relevant, not redundant, nor in conflict with other tickets.

Describe the bug
Sample lib companion to:

• Add support for sample/lab apps and library to build-run and unit-test workflows cFS#798

Expected behavior
Add build-run-app and unit-test-coverage workflow yaml's.

Reporter Info
Avi Weiss   @thnkslprpt