Add CMietinkasso entity and localization support

- Introduced a new entity "CMietinkasso" with its metadata definitions, including fields, links, and indexes.
- Added controller for CMietinkasso to handle business logic.
- Created localization files for CMietinkasso in multiple languages (e.g., English, German, Spanish, etc.) to support internationalization.
- Updated global JSON files to include references to the new entity.
- Modified configuration files to integrate CMietinkasso into the application structure.

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

@@ -11,7 +11,8 @@
         "Call": "Anruf",
         "Contact": "Portalnutzer",
         "CCallQueues": "Call-Queue",
-        "CBankverbindungen": "Bankverbindung"
+        "CBankverbindungen": "Bankverbindung",
+        "CMietinkasso": "Mietinkasso"
     },
     "scopeNamesPlural": {
         "CVmhMietverhltnis": "Mietverhältnisse",
@@ -25,6 +26,7 @@
         "Call": "Anrufe",
         "Contact": "Portalnutzer",
         "CCallQueues": "Call-Queues",
-        "CBankverbindungen": "Bankverbindungen"
+        "CBankverbindungen": "Bankverbindungen",
+        "CMietinkasso": "Mietinkassa"
     }
 }