Fixing the CodeSystem temporarily

[jkiddo]

📑 Description

This pull request introduces significant improvements to the handling of DICOM UID codes in the IHE FormatCode vocabulary implementation. The main change is the replacement of the previous non-expandable reference to the DICOM ontology with a new, locally defined, computable FHIR CodeSystem for DICOM UIDs. This enables proper expansion and validation of the ValueSet, particularly for the XDS-I KOS FormatCode. Additionally, the build scripts for both Windows (_build.bat) and Unix (_build.sh) have been modernized and unified, improving usability and maintainability.

The most important changes are:

FHIR Terminology Improvements:

• Introduced a new FHIR CodeSystem resource (codesystem-dicom-uid.xml) that enumerates the DICOM UID(s) referenced by the FormatCode ValueSet, enabling expansion and validation. This replaces the previous non-expandable external reference.
• Updated the ValueSet/formatcode resource to reference the new local CodeSystem (http://ihe.net/fhir/ihe.formatcode.fhir/CodeSystem/dicom-uid) instead of the DICOM RDF/OWL ontology, and added explanatory comments.
• Registered the new CodeSystem as a resource and as a special-url in the IG definition (implementationguide-IHE.FormatCode.xml). [1] [2]
• Updated ignoreWarnings.txt to remove now-unnecessary warning suppressions for the DICOM UID code system, with explanatory comments about the change.

Build Script Modernization:

• Rewrote both _build.bat (Windows) and _build.sh (Unix) scripts for greater robustness, feature parity, and improved user interaction. The scripts now provide consistent options for downloading/updating the publisher, building the IG, running Jekyll, and cleaning up, with better handling of publisher location and online/offline status. [1] [2]
• Improved the network connectivity check in _updatePublisher.bat to use PowerShell for reliability, matching the approach in the new build scripts.

Closes #

✅ Checks

• [ X] My pull request adheres to the code style of this project
• [ X] My code requires changes to the documentation
• [ X] I have updated the documentation as required
• [ X] All the tests have passed
• [ X] I have selected a committee co-chair to review the PR ( @oliveregger looking at you 👀 )

ℹ Additional Information

[jkiddo]

@mattblackmon as discussed 👆