fix(repository-json-schema): use correct behavior for hidden properties

[taylorcoffelt]

Update emitted json schema to always omit properties marked as hidden at both model and property levels.

This also affects schema emitted for related models.

Currently, hidden properties are only omitted at the top level in the model schema. If a related model was included as part of the emitted schema, the hiddenbehavior on the model or model properties would be ignored, and the entire nested schema emitted, defeating the purpose of the hidden fields, and requiring additional models / extra work to omit them from the emitted schema.

Potentially Fixes #7517 Fixes #4495 Fixes #1914

Checklist

• [x] DCO (Developer Certificate of Origin) signed in all commits
• [x] npm test passes on your machine
• [x] New tests added or existing tests modified to cover all changes
• [x] Code conforms with the style guide
• [ ] API Documentation in code was updated
• [ ] Documentation in /docs/site was updated
• [ ] Affected artifact templates in packages/cli were updated
• [ ] Affected example projects in examples/* were updated