Implement support ticket system with role request and bug report functionalities

- Introduced a new support ticket system allowing users to submit bug reports and role requests.
- Implemented endpoints for creating, updating, and managing support tickets, including file attachments.
- Enhanced Telegram bot integration to handle role requests directly within the bot, enabling admins to approve or reject requests without accessing the website.
- Updated database schema to include support ticket entities and their relationships.
- Improved API documentation to reflect new support ticket endpoints and their usage.
- Added necessary localization for support ticket features in both Russian and English.

backend/src/PnvPanel.Api/Program.cs

@@ -156,6 +156,8 @@ app.MapAdminUserEndpoints();
 app.MapAdminStatsEndpoints();
 app.MapAdminAppEndpoints();
 app.MapAdminNewsEndpoints();
+app.MapSupportEndpoints();
+app.MapAdminSupportEndpoints();
 app.MapTelegramEndpoints();
 
 app.MapHub<PanelHub>("/hubs/panel");