Add termination (Kündigung) functionality and related translations

- Implemented the ability to initiate terminations from Mietverhältnisse.
- Added new fields and options for terminations in both German and English language files.
- Updated metadata definitions to include relationships for terminations with Mietobjekte and Beteiligte.
- Enhanced the service layer to handle termination creation, including linking relevant entities and copying documents.
- Updated configuration timestamps for deployment.

custom/Espo/Custom/Resources/i18n/en_US/CMietobjekt.json

@@ -20,6 +20,7 @@
         "contact2mietobjekt": "Contacts",
         "vmhRumungsklages": "Eviction Lawsuits",
         "mietinkassos": "Rent Collection",
+        "kndigungen": "Terminations",
         "contactsMietobjekt": "Portal Users",
         "dokumentesMietobjekt": "Documents"
     },