Add CAdvowareAkten entity and related metadata

- Introduced new entity CAdvowareAkten with fields: name, description, createdAt, modifiedAt, assignedUser, teams, vmhRumungsklage, mietinkasso, aktenzeichen, and aktennummer.
- Defined relationships for CAdvowareAkten with existing entities: CVmhRumungsklage and CMietinkasso.
- Created client definitions, layouts, and ACL for CAdvowareAkten.
- Added internationalization support for CAdvowareAkten in multiple languages.
- Updated existing entities and metadata to include references to CAdvowareAkten.

custom/Espo/Custom/Controllers/CAdvowareAkten.php

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