Added ctd

Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Gode, Sebastian <sebastian.gode@t-systems.com>
Co-committed-by: Gode, Sebastian <sebastian.gode@t-systems.com>

otc_metadata/data/documents/ctd-umn.yaml

@@ -0,0 +1,8 @@
+---
+html_location: docs/ctd/umn
+link: /cloud-topology-designer/umn/
+pdf_name: ctd-umn
+rst_location: umn/source
+service_type: ctd
+title: User Guide
+type: umn

otc_metadata/data/services/ctd.yaml

@@ -0,0 +1,13 @@
+---
+environment: hidden
+repositories:
+- environment: public
+  repo: opentelekomcloud-docs/cloud-topology-designer
+  type: github
+service_category: other
+service_title: Cloud Topology Designer
+service_type: ctd
+service_uri: cloud-topology-designer
+teams:
+- name: topology-designer-rw
+  permission: write