Revert "Revert "Add vanilla Bookbinder layout template with pre-content partial call [#169586321]""
Revert "Revert "Add vanilla Bookbinder layout template with pre-content partial call [#169586321]""

This reverts commit f256ff96fe4a26462248d60fc932bee66da1193c.

cloudfoundry/docs-book-cloudfoundry,swisscom/docs-appcloud-book,cloudfoundry/docs-book-cloudfoundry,cloudfoundry/docs-book-cloudfoundry,swisscom/docs-appcloud-book,cloudfoundry/docs-book-cloudfoundry,swisscom/docs-appcloud-book,swisscom/docs-appcloud-book