chore: remove deprecated horses, clubs, officials, and persons services

- Deleted obsolete modules related to horses, clubs, officials, and persons services, including their configurations, build files, and database provisioning scripts.
- Cleaned up associated references in the project structure (e.g., `settings.gradle.kts`).
- Removed unused database tables and Spring beans related to these domains.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

frontend/features/veranstaltung-feature/src/jvmMain/kotlin/at/mocode/veranstaltung/feature/presentation/VeranstaltungUebersichtScreen.kt

@@ -105,7 +105,7 @@ fun VeranstaltungUebersichtScreen(
 
   Column(modifier = Modifier.fillMaxSize()) {
     // Tab-Header gemäß Figma
-    TabRow(
+    PrimaryTabRow(
       selectedTabIndex = 0,
       containerColor = MaterialTheme.colorScheme.surface,
       contentColor = Color(0xFF1E3A8A),