[ACS-12037] Remove Knowledge Discovery from ACA (#5278)

* [ACS-12037] Remove Knowledge Discovery from ACA

* [ACS-12037] CR comments

* [ACS-12037] Update package-lock

* [ACS-12037] Add new rule documentation

* [ACS-12037] Fix unit tests

docs/extending/rules-list.md

@@ -59,6 +59,7 @@ Application related evaluators which can be used to check various different aspe
 | 5.1.1  | isMultiSelection                    | Checks if the user has selected multiple files                                                                         |
 | 6.1.0  | canPrintFile                        | Checks if current file can be printed or not (media files such as audio/video cannot be printed).                      |
 | 7.4.0  | app.selection.isCheckedOut          | Checks if selected node contains `cm:checkedOut` aspect.                                                               |
+| 8.0.0  | app.isKnowledgeDiscoveryUrlPresent  | Checks if the Knowledge Discovery URL is specified in the app config.                                                 |
 
 #### Navigation Rules/Evaluators
 

docs/features/README.md

@@ -27,3 +27,12 @@ This application simplifies the complexity of Content Management and provides co
 - [Search forms](/features/search-forms)
 - [Application Hook](/extending/application-hook)
 - [Context Menu actions](context-menu-actions)
+
+## Notes
+
+### Knowledge Discovery removal (v8.0.0)
+
+The Knowledge Discovery components, services, and APIs have been removed as of ACA version 8.0.0 and ADF version 9.0.0.
+The integrated Knowledge Discovery features have been replaced with a section in the side navigation panel containing a link to the standalone Knowledge Discovery UI in ACA and ADW.
+
+If you were using those features, please consider cleaning Local Storage in your browser as *aiReferences* entry may remain.