Add Databricks pages in Cloud (#321)

* Add Databricks pages in Cloud

* Add beta indicator back for Databricks doc

* Update local-antora-playbook.yml

Author: kbatuigas

modules/ROOT/nav.adoc

@@ -399,6 +399,7 @@
 *** xref:manage:iceberg/choose-iceberg-mode.adoc[Choose Iceberg Mode]
 *** xref:manage:iceberg/use-iceberg-catalogs.adoc[]
 *** xref:manage:iceberg/query-iceberg-topics.adoc[]
+*** xref:manage:iceberg/iceberg-topics-databricks-unity.adoc[Query Iceberg Topics with Databricks Unity Catalog]
 *** xref:manage:iceberg/redpanda-topics-iceberg-snowflake-catalog.adoc[Query Iceberg Topics with Snowflake]
 ** xref:manage:schema-reg/index.adoc[Schema Registry]
 *** xref:manage:schema-reg/schema-reg-overview.adoc[]

modules/manage/pages/iceberg/iceberg-topics-databricks-unity.adoc

@@ -0,0 +1,6 @@
+= Query Iceberg Topics using Databricks and Unity Catalog
+:description: Add Redpanda topics as Iceberg tables that you can query in Databricks managed by Unity Catalog.
+:page-categories: Iceberg, Tiered Storage, Management, High Availability, Data Replication, Integration
+:page-beta: true
+
+include::ROOT:manage:iceberg/iceberg-topics-databricks-unity.adoc[tag=single-source]