feat: add platform public question bank workspace

Tiku.Infrastructure/DependencyInjection.cs

@@ -133,6 +133,7 @@ public static class DependencyInjection
         services.AddScoped<ITenantAdminDirectService, TenantAdminDirectService>();
         services.AddScoped<IBackofficeService, BackofficeService>();
         services.AddScoped<IPlatformAdminService, PlatformAdminService>();
+        services.AddScoped<IPlatformQuestionBankService, PlatformQuestionBankService>();
         services.AddScoped<IPlatformCrmAdminService, PlatformCrmAdminService>();
         services.AddScoped<IPlatformSmsAdminService, PlatformSmsAdminService>();
         services.AddScoped<IPlatformPaymentSettingsService, PlatformPaymentSettingsService>();