chore(turnier-feature): remove unused ViewModels and UI components

- Removed `AbteilungViewModel`, `BewerbAnlegenViewModel`, `BewerbViewModel`, and `CreateBewerbWizardScreen`.
- Cleaned up related imports and unused domain models.

backend/services/masterdata/masterdata-domain/build.gradle.kts

@@ -1,3 +1,5 @@
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+
 plugins {
   alias(libs.plugins.kotlinMultiplatform)
   alias(libs.plugins.kotlinSerialization)
@@ -8,6 +10,10 @@ kotlin {
   js(IR) {
     browser()
   }
+  @OptIn(ExperimentalWasmDsl::class)
+  wasmJs {
+    browser()
+  }
 
   sourceSets {
     val commonMain by getting {