Add CKndigung entity and related resources

- Created CKndigung controller extending BasePlus.
- Added internationalization support for CKndigung in multiple languages (ar_AR, bg_BG, cs_CZ, da_DK, de_DE, en_GB, en_US, es_ES, es_MX, fa_IR, fr_FR, hr_HR, hu_HU, id_ID, it_IT, ja_JP, lt_LT, lv_LV, nb_NO, nl_NL, pl_PL, pt_BR, pt_PT, ro_RO, ru_RU, sk_SK, sl_SI, sr_RS, sv_SE, th_TH, tr_TR, uk_UA, vi_VN, zh_CN, zh_TW).
- Defined CKndigung metadata including entity definitions, record definitions, and scopes.
- Updated global configuration to include CKndigung in relevant lists.

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

@@ -12,7 +12,8 @@
         "Contact": "Portalnutzer",
         "CCallQueues": "Call-Queue",
         "CBankverbindungen": "Bankverbindung",
-        "CMietinkasso": "Mietinkasso"
+        "CMietinkasso": "Mietinkasso",
+        "CKndigung": "Kündigung"
     },
     "scopeNamesPlural": {
         "CVmhMietverhltnis": "Mietverhältnisse",
@@ -27,6 +28,7 @@
         "Contact": "Portalnutzer",
         "CCallQueues": "Call-Queues",
         "CBankverbindungen": "Bankverbindungen",
-        "CMietinkasso": "Mietinkassa"
+        "CMietinkasso": "Mietinkassa",
+        "CKndigung": "Kündigungen"
     }
 }