Move old schemas to _archive_

Update schema-test-coverage.sh

Author: ralfhandl

.gitignore

@@ -8,5 +8,5 @@ node_modules/
 deploy/
 deploy-preview/
 coverage/
-history
+_site/
 Gemfile.lock

_archive_/schemas/README.md

@@ -0,0 +1,9 @@
+# Archive of outdated JSON Schema Files
+
+> [!TIP]
+> JSON Schema files for validating OpenAPI descriptions using current OpenAPI versions are available on https://spec.openapis.org/#openapi-specification-schemas.
+>
+> These schema files are maintained in the `src/schemas` folder of the corresponding `vX.Y-dev` branch in this repository.
+
+> [!CAUTION]
+> Schema files in this folder are not maintained any more and are not intended for productive use.