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

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

frontend/core/domain/build.gradle.kts

@@ -5,14 +5,11 @@ plugins {
 
 kotlin {
   jvm()
-  js {
-    binaries.library()
-    // Re-enabled browser environment after Root NodeJs fix
-    browser {
-      testTask {
-        enabled = false
-      }
-    }
+  js(IR) {
+    browser()
+  }
+  wasmJs {
+    browser()
   }
 
   sourceSets {