Synchronization of separate CIS YAML from OAPI-Coverages with CIS 1.1 schema

[jerstlouis]

• The CIS schema was split into separate YAML files for ease of inclusion in OpenAPI responses
• We need to ensure that the JSON schema(s) remain synchronized
• We need to ensure any recent fixes planned for CIS 1.1.1 corrigendum are included
• We should also tackle how OGC API specifications reference external standards (CIS, but also Common - Part 1, Part 2)
• Can a beta.schemas.opengis.net help to refer to specifications in progress?
• References should be consistent always referencing the same file types
• Can JSON files all be automatically generated, without being tracked in git repositories?