Enhance vehicle transport functionality in FalukantService and update UI components

- Modified the createTransport method in FalukantService to support optional vehicleIds, allowing for more flexible vehicle selection.
- Implemented logic to ensure that either specific vehicleIds or a vehicleTypeId must be provided, improving error handling for vehicle availability.
- Updated the BranchView component to include new UI elements for sending vehicles, including buttons for sending single or multiple vehicles of the same type.
- Added a modal dialog for selecting target branches when sending vehicles, enhancing user experience and streamlining transport operations.
- Updated German localization files to include new translations related to vehicle actions and transport functionalities.

frontend/src/i18n/locales/de/falukant.json

@@ -295,13 +295,26 @@
                     "mode": "Art",
                     "speed": "Geschwindigkeit",
                     "availableFrom": "Verfügbar ab",
-                    "status": "Status"
+                    "status": "Status",
+                    "actions": "Aktionen"
                 },
                 "status": {
                     "inUse": "In Benutzung (mit Transport verknüpft)",
                     "building": "Im Bau",
                     "free": "Verfügbar"
-                }
+                },
+                "send": "Versenden",
+                "sendSingle": "Einzelnes Fahrzeug versenden",
+                "sendAllFree": "Alle freien Fahrzeuge versenden",
+                "sendAllOfType": "{count} × {type} versenden",
+                "sendVehiclesTitle": "Fahrzeuge versenden",
+                "selectTargetBranch": "Ziel-Niederlassung",
+                "selectTarget": "Ziel-Niederlassung auswählen",
+                "selectTargetError": "Bitte wähle eine Ziel-Niederlassung aus.",
+                "noVehiclesSelected": "Keine Fahrzeuge ausgewählt.",
+                "sendSuccess": "Fahrzeuge erfolgreich versendet!",
+                "sendError": "Fehler beim Versenden der Fahrzeuge.",
+                "cancel": "Abbrechen"
             },
             "stocktype": {
                 "wood": "Holzlager",