Enhance role management by adding pricing fields and updating related logic

- Updated `CreateRoleCommand` and `UpdateRoleCommand` to include optional pricing fields: `PricePerConfigPerQuarter` and `PricePerConfigPerYear`.
- Modified `RoleEndpoints` to handle the new pricing parameters during role creation and updates.
- Enhanced validation logic in `CreateRoleCommandValidator` and `UpdateRoleCommandValidator` to ensure pricing fields are non-negative when provided.
- Updated `RoleDto` and `SelectableRoleDto` to include pricing information, ensuring proper data handling in API responses.
- Adjusted frontend components to support new pricing fields in role forms and display total costs based on configurations.
- Updated API documentation to reflect changes in role management endpoints and pricing structure.

backend/src/PnvPanel.Infrastructure/Persistence/Migrations/AppDbContextModelSnapshot.cs

@@ -708,6 +708,12 @@ namespace PnvPanel.Infrastructure.Persistence.Migrations
                         .HasMaxLength(256)
                         .HasColumnType("character varying(256)");
 
+                    b.Property<int?>("PricePerConfigPerQuarter")
+                        .HasColumnType("integer");
+
+                    b.Property<int?>("PricePerConfigPerYear")
+                        .HasColumnType("integer");
+
                     b.HasKey("Id");
 
                     b.HasIndex("NormalizedName")