Initialize CBDD solution and add a .NET-focused gitignore for generated artifacts.

tests/CBDD.Tests.Benchmark/Person.cs

@@ -0,0 +1,35 @@
+using ZB.MOM.WW.CBDD.Bson;
+using System;
+using System.Collections.Generic;
+
+namespace ZB.MOM.WW.CBDD.Tests.Benchmark;
+
+public class Address
+{
+    public string Street { get; set; } = string.Empty;
+    public string City { get; set; } = string.Empty;
+    public string ZipCode { get; set; } = string.Empty;
+}
+
+public class WorkHistory
+{
+    public string CompanyName { get; set; } = string.Empty;
+    public string Title { get; set; } = string.Empty;
+    public int DurationYears { get; set; }
+    public List<string> Tags { get; set; } = new();
+}
+
+public class Person
+{
+    public ObjectId Id { get; set; }
+    public string FirstName { get; set; } = string.Empty;
+    public string LastName { get; set; } = string.Empty;
+    public int Age { get; set; }
+    public string? Bio { get; set; } = string.Empty;
+    public DateTime CreatedAt { get; set; }
+
+    // Complex fields
+    public decimal Balance { get; set; }
+    public Address HomeAddress { get; set; } = new();
+    public List<WorkHistory> EmploymentHistory { get; set; } = new();
+}