[ACS-12037] Remove Knowledge Discovery from ADF (#12042)

* [ACS-12037] Remove Knowledge Discovery from ADF

* [ACS-12037] Resolve Copilot CR comments

* [ACS-12037] Complete cleanup, revert i18n changes

* [ACS-12037] Cleanup features and APIs related to hxiconnector

* [ACS-12037] Update docs

docs/README.md

@@ -351,7 +351,6 @@ for more information about installing and using the source code.
 
 | Name | Description | Source link |
 | ---- | ----------- | ----------- |
-| [Agent Service](content-services/services/agent.service.md) | Manages agents in Content Services. | [Source](../lib/content-services/src/lib/agent/services/agent.service.ts) |
 | [Audit Service](content-services/services/audit.service.md) | Manages Audit apps and entries. | [Source](../lib/content-services/src/lib/audit/audit.service.ts) |
 | [Card View Content Update Service](content-services/services/card-view-content-update.service.md) | Manages Card View properties in the content services environment. Implements BaseCardViewContentUpdate. | [Source](../lib/content-services/src/lib/common/services/card-view-content-update.service.ts) |  |
 | [Category tree datasource service](content-services/services/category-tree-datasource.service.md) | Datasource service for category tree. | [Source](../lib/content-services/src/lib/category/services/category-tree-datasource.service.ts) |
@@ -367,7 +366,6 @@ for more information about installing and using the source code.
 | [Node Comments Service](content-services/services/node-comments.service.md) | Adds and retrieves comments for nodes in Content Services. | [Source](../lib/content-services/src/lib/node-comments/services/node-comments.service.ts) |
 | [Node permission dialog service](content-services/services/node-permission-dialog.service.md) | Displays dialogs to let the user set node permissions. | [Source](../lib/content-services/src/lib/permission-manager/services/node-permission-dialog.service.ts) |
 | [Node Permission service](content-services/services/node-permission.service.md) | Manages role permissions for content nodes. | [Source](../lib/content-services/src/lib/permission-manager/services/node-permission.service.ts) |
-| [Search Ai Service](content-services/services/search-ai.service.md) | Manages search AI in Content Services. | [Source](../lib/content-services/src/lib/search-ai/services/search-ai.service.ts) |
 | [Search filter service](content-services/services/search-filter.service.md) | Registers widgets for use with the Search Filter component. | [Source](../lib/content-services/src/lib/search/services/search-filter.service.ts) |
 | [Search Query Builder service](content-services/services/search-query-builder.service.md) | Stores information from all the custom search and faceted search widgets, compiles and runs the final search query. | [Source](../lib/content-services/src/lib/search/services/search-query-builder.service.ts) |
 | [Security Controls service](content-services/services/security-controls.service.md) | Manages security groups & marks in Content Services. | [Source](../lib/content-services/src/lib/security/services/security-controls-groups-marks-security.service.ts) |
@@ -567,3 +565,12 @@ Contains all custom rules used by ESLint.
 <!--eslint-angular end-->
 
 [(Back to Contents)](#contents)
+
+## Notes
+
+### Knowledge Discovery removal (v9.0.0)
+
+The Knowledge Discovery components, services, and APIs have been removed as of 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 application in higher level apps such as ACA and ADW.
+
+If you were using those features, please consider cleaning Local Storage in your browser as *aiReferences* entry may remain.