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.Application/Support/CreateRoleRequest/CreateRoleRequestTicketCommand.cs

@@ -0,0 +1,10 @@
+using PnvPanel.Application.Common.Messaging;
+using PnvPanel.Application.Common.Models;
+
+namespace PnvPanel.Application.Support.CreateRoleRequest;
+
+/// <summary>Ровно один из вариантов: ExistingRoleId, либо NewRoleName+NewRoleMaxConfigs+NewRoleMaxIpLimit
+/// (проверяется валидатором).</summary>
+public sealed record CreateRoleRequestTicketCommand(
+    Guid? ExistingRoleId, string? NewRoleName, int? NewRoleMaxConfigs, int? NewRoleMaxIpLimit, string Justification)
+    : ICommand<Result<TicketDetailDto>>, IRequiresActivation;