Report merge (#9532)

* Report merge

* Remove auto-generated file

* Remove pre-commit file

* Revert "Remove pre-commit file"

This reverts commit 00d80bae2a.

* Update API version

* Reduced duplicated logic

* reset pre-commit config

* Added migration files

* Added unit test

* Removed redundant migration

* Updated migration file

* Added a default report template with merge enabled

* Unit test to ensure a single page is generated

* Added docs to support merge feature

* Clean up

* Clean up

* Fixed unresolved link

* Updated API version

* Fixed test report path issue

* Add plugin context for each instance

* merge in master

* Fixed formating

* Added more detailed user guide

* Updated docs

* Added assert to ensure test html output exists

* Updated docs

* Fixed report test path

---------

Co-authored-by: Matthias Mair <code@mjmair.com>

src/frontend/src/pages/Index/Settings/AdminCenter/ReportTemplatePanel.tsx

@@ -21,6 +21,12 @@ function ReportTemplateTable() {
               <YesNoButton value={instance.landscape} />
             )
           },
+          merge: {
+            label: t`Merge`,
+            modelRenderer: (instance: any) => (
+              <YesNoButton value={instance.merge} />
+            )
+          },
           attach_to_model: {
             label: t`Attach to Model`,
             modelRenderer: (instance: any) => (