InspectorXSLT as InspectorSchematron

[wendellpiez]

User Story:

Picking up from #61, and now we also have an InspectorXSLT (behind #72) that implements constraints logic, it would be very nice to have a Schematron implementation that could support Metaschema constraints (indeed all Metaschema-based rules) in Schematron environments.

Templates could be ported and/or shared with InspectorXSLT, or possibly the Schematron could be implemented as a shell around the InspectorXSLT?

Goals:

A Schematron that provides at least the same runtime functionality as InspectorXSLT with respect both to constraints and to basic testing (cardinality naming and placement).

Could be an extension to InspectorXSLT, or a standalone application.

Dependencies:

PR #72 is accepted, providing a foundation.

Acceptance Criteria

• All website and readme documentation affected by the changes in this issue have been updated. Changes to the website can be made in the docs/content directory of your branch.
• A Pull Request (PR) is submitted that fully addresses the goals of this User Story. This issue is referenced in the PR.
• The CI-CD build process runs without any reported errors on the PR. This can be confirmed by reviewing that all checks have passed in the PR.