add api-ref documentation to Cloud Create

Reviewed-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-authored-by: tischrei <tino.schreiber@t-systems.com>
Co-committed-by: tischrei <tino.schreiber@t-systems.com>

otc_metadata/data/documents/cc-api-ref.yaml

@@ -0,0 +1,8 @@
+---
+html_location: docs/cc/api-ref
+link: /cloud-create/api-ref/
+pdf_name: cc-api-ref
+rst_location: api-ref/source
+service_type: cc
+title: API Reference
+type: api-ref