Add instructions management functionality and update related components

- Introduced new endpoints for managing instruction intros and tabs, allowing admins to create, update, and delete instructional content.
- Enhanced the FactoryResetCommandHandler to include the seeding of instruction data during a factory reset.
- Updated the database schema to include InstructionIntro and InstructionTab entities, with corresponding migrations.
- Improved frontend routing and components to support the new instructions section, including a dedicated page for displaying instructions and tabs.
- Enhanced API documentation to reflect the new instruction management features and their expected request/response formats.
- Added localization support for the new instructions functionality in both Russian and English.

backend/src/PnvPanel.Infrastructure/DependencyInjection.cs

@@ -10,6 +10,7 @@ using PnvPanel.Application.Common.Interfaces;
 using PnvPanel.Infrastructure.Apps;
 using PnvPanel.Infrastructure.BackgroundJobs;
 using PnvPanel.Infrastructure.Identity;
+using PnvPanel.Infrastructure.Instructions;
 using PnvPanel.Infrastructure.Persistence;
 using PnvPanel.Infrastructure.Security;
 using PnvPanel.Infrastructure.Storage;
@@ -137,6 +138,7 @@ public static class DependencyInjection
         services.AddScoped<IRefreshTokenService, RefreshTokenService>();
         services.AddScoped<IRoleService, RoleService>();
         services.AddScoped<IClientAppCatalogSeeder, ClientAppCatalogSeeder>();
+        services.AddScoped<IInstructionIntroSeeder, InstructionIntroSeeder>();
         // Один и тот же экземпляр CurrentUser на scope — и как ICurrentUser (чтение), и как
         // ICurrentUserSetter (запись, только для Telegram-бота, см. TelegramBotHostedService).
         services.AddScoped<CurrentUser>();