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/CBeteiligte.json

@@ -11,6 +11,8 @@
         "vmhRumungsklagesKlaeger": "Plaintiff",
         "mietinkassosKlaeger": "Rent Collection (Plaintiff)",
         "mietinkassosBeklagte": "Rent Collection (Defendant)",
+        "kndigungenKuendiger": "Terminations (Terminating Party)",
+        "kndigungenGekuendigte": "Terminations (Terminated Party)",
         "contactsBeteiligte": "Portal Users",
         "dokumentesBeteiligte": "Documents"
     },
@@ -27,6 +29,8 @@
         "vmhRumungsklagesKlaeger": "Plaintiff",
         "mietinkassosKlaeger": "Rent Collection (Plaintiff)",
         "mietinkassosBeklagte": "Rent Collection (Defendant)",
+        "kndigungenKuendiger": "Terminations (Terminating Party)",
+        "kndigungenGekuendigte": "Terminations (Terminated Party)",
         "contactsBeteiligte": "Portal Users",
         "dokumentesBeteiligte": "Documents",
         "bankverbindungens": "Bank Accounts"