Refactor pricing endpoints and enhance support for pricing retrieval

- Added a new endpoint `/api/support/pricing` to allow users to retrieve pricing information, making it accessible for role request dialogs.
- Introduced the `GetSupportPricing` method to handle pricing queries, ensuring that pricing data is available to non-admin users.
- Updated frontend components to integrate the new pricing retrieval functionality, displaying estimated costs based on user-selected configurations.
- Removed the `PricingSettingsDto` as it is no longer needed, streamlining the pricing data structure.
- Enhanced API documentation to reflect the new endpoint and its usage in the support context.

backend/src/PnvPanel.Api/Endpoints/AdminPricingEndpoints.cs

@@ -1,5 +1,6 @@
 using PnvPanel.Api.Common;
 using PnvPanel.Application.Admin.Pricing;
+using PnvPanel.Application.Common.Interfaces;
 using PnvPanel.Application.Common.Messaging;
 using PnvPanel.Infrastructure.Identity;
 

backend/src/PnvPanel.Api/Endpoints/SupportEndpoints.cs

@@ -8,6 +8,7 @@ using PnvPanel.Application.Support.AddComment;
 using PnvPanel.Application.Support.CreateBugReport;
 using PnvPanel.Application.Support.CreateRoleRequest;
 using PnvPanel.Application.Support.GetAttachment;
+using PnvPanel.Application.Support.GetSupportPricing;
 using PnvPanel.Application.Support.GetTicket;
 using PnvPanel.Application.Support.ListMyTickets;
 using PnvPanel.Application.Support.ListSelectableRoles;
@@ -23,6 +24,7 @@ public static class SupportEndpoints
         var group = app.MapGroup("/api/support").WithTags("Support").RequireAuthorization();
 
         group.MapGet("/roles", ListSelectableRoles).Produces<IReadOnlyList<RoleDto>>();
+        group.MapGet("/pricing", GetSupportPricing).Produces<PricingSettingsDto>();
         group
             .MapPost("/tickets/bug-reports", CreateBugReport)
             .DisableAntiforgery()
@@ -49,6 +51,15 @@ public static class SupportEndpoints
         return result.ToHttpResult();
     }
 
+    private static async Task<IResult> GetSupportPricing(
+        ISender sender,
+        CancellationToken cancellationToken
+    )
+    {
+        var result = await sender.Send(new GetSupportPricingQuery(), cancellationToken);
+        return result.ToHttpResult();
+    }
+
     private static async Task<IResult> CreateBugReport(
         [FromForm] string message,
         IFormFileCollection? files,