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/Resources/metadata/entityDefs/Meeting.json

@@ -15,7 +15,8 @@
                 "CCallQueues",
                 "CMietinkasso",
                 "CKuendigung",
-                "CPuls"
+                "CPuls",
+                "CAdvowareAkten"
             ]
         }
     }