Implement pricing management functionality and update related components

- Added new endpoints for managing global pricing settings, including retrieval and updates for `PricePerConfigPerQuarter` and `PricePerConfigPerYear`.
- Updated `RoleService` and related commands to remove pricing fields from role management, ensuring a clear separation between role configurations and global pricing.
- Enhanced the `FactoryResetCommandHandler` to include seeding of pricing settings during a factory reset.
- Modified frontend components to support new pricing settings, including forms for creating and updating pricing information.
- Updated API documentation to reflect changes in pricing management endpoints and their expected request/response formats.
- Adjusted tests to ensure proper coverage for new pricing functionalities and their integration with existing role management features.

backend/src/PnvPanel.Infrastructure/Identity/AppRole.cs

@@ -18,14 +18,6 @@ public class AppRole : IdentityRole<Guid>
 
     public bool IsSystem { get; set; }
 
-    /// <summary>Справочная цена за конфиг за минимальный период оплаты (3 месяца), в рублях. Только для
-    /// отображения админу — без биллинга/статусов оплаты. У роли `admin` всегда null.</summary>
-    public int? PricePerConfigPerQuarter { get; set; }
-
-    /// <summary>Справочная цена за конфиг за год, в рублях. Задаётся независимо от квартальной цены
-    /// (не производная — позволяет админу задать скидку за годовую оплату). У роли `admin` всегда null.</summary>
-    public int? PricePerConfigPerYear { get; set; }
-
     public AppRole() { }
 
     public AppRole(string name)