doctl-databases-*: add page (#10882)

* doctl-databases-*: add page

---------

Co-authored-by: Reinhart Previano Koentjoro <reinhart_previano@yahoo.com>
Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/doctl-databases.md

@@ -0,0 +1,24 @@
+# doctl databases
+
+> Manage your MySQL, Redis, PostgreSQL, and MongoDB database services.
+> More information: <https://docs.digitalocean.com/reference/doctl/reference/databases>.
+
+- Run a `doctl databases` command with an access token:
+
+`doctl databases {{command}} --access-token {{access_token}}`
+
+- Get details for a database cluster:
+
+`doctl databases get`
+
+- List your database clusters:
+
+`doctl databases list`
+
+- Create a database cluster:
+
+`doctl databases create {{database_name}}`
+
+- Delete a cluster:
+
+`doctl databases delete {{database_id}}`