Refactor. Add data layer

BudgetApp/Services/Models/ChartDataset.cs

@@ -0,0 +1,9 @@
+namespace BudgetApp.Services.Models;
+
+public class ChartDataset
+{
+    public string Label { get; set; } = string.Empty;
+    public string Color { get; set; } = "#1b6ec2";
+    public List<decimal> Data { get; set; } = [];
+    public string CurrencySymbol { get; set; } = "$";
+}