add business dashboard (#108)

Reviewed-on: #108
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Sebastian Gode <sebastian.gode@telekom.de>

otc_metadata/data/documents/bd-umn.yaml

@@ -0,0 +1,12 @@
+---
+html_location: docs/bd/umn
+link: /business-dashboard/umn/
+rst_location: umn/source
+service_type: bd
+title: User Guide
+type: umn
+cloud_environments:
+  - name: eu_de
+    visibility: public
+    pdf_visibility: hidden
+    pdf_enabled: false