Add AI Knowledge entity and related localization

- Introduced CAIKnowledge entity with fields for name, description, and relationships to Mietinkasso and Räumungsklage.
- Added localization files for CAIKnowledge in multiple languages including English, German, Spanish, and more.
- Updated existing JSON files to include references to AI Knowledge where applicable.
- Created necessary metadata definitions for client, entity, and record definitions for CAIKnowledge.
- Enhanced existing documents and mietinkasso resources to support new AI Knowledge functionality.

custom/Espo/Custom/Controllers/CAIKnowledge.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Espo\Custom\Controllers;
+
+class CAIKnowledge extends \Espo\Core\Templates\Controllers\Base
+{
+}