Implemented models

PostFundManagement.Domain/Models/Budget.cs

@@ -0,0 +1,20 @@
+namespace PostFundManagement.Domain.Models;
+
+public class Budget
+{
+    public long Id { get; set; }
+
+    public long ProjectId { get; set; }
+
+    public Guid CreatedBy { get; set; }
+
+    public Guid? ApprovedBy { get; set; }
+
+    public DateTime CreatedAt { get; set; }
+
+    public DateTime? UpdatedAt { get; set; }
+
+    public string? Name { get; set; }
+
+    public decimal Amount { get; set; }
+}