Remove nennung-feature (domain models, DI modules, and UI components).

frontend/features/veranstalter-feature/src/commonMain/kotlin/at/mocode/frontend/features/veranstalter/domain/Veranstalter.kt

@@ -0,0 +1,12 @@
+package at.mocode.frontend.features.veranstalter.domain
+
+data class Veranstalter(
+    val id: String,
+    val name: String,
+    val verein: String? = null,
+    val adresse: String? = null,
+    val email: String? = null,
+    val telefon: String? = null,
+    val znsId: String? = null,
+    val oepsNummer: String? = null
+)