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/i18n/zh_CN/CAdvowareAkten.json

@@ -0,0 +1,10 @@
+{
+  "links": {
+    "meetings": "会议",
+    "calls": "通话",
+    "tasks": "任务"
+  },
+  "labels": {
+    "Create CAdvowareAkten": "创建 Advoware Akten"
+  }
+}