Initial import of the CBDDC codebase with docs and tests. Add a .NET-focused gitignore to keep generated artifacts out of source control.

samples/ZB.MOM.WW.CBDDC.Sample.Console/User.cs

@@ -0,0 +1,35 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace ZB.MOM.WW.CBDDC.Sample.Console;
+
+public class User
+{
+    /// <summary>
+    /// Gets or sets the unique user identifier.
+    /// </summary>
+    [Key]
+    public string Id { get; set; } = "";
+
+    /// <summary>
+    /// Gets or sets the user name.
+    /// </summary>
+    public string? Name { get; set; }
+
+    /// <summary>
+    /// Gets or sets the user age.
+    /// </summary>
+    public int Age { get; set; }
+
+    /// <summary>
+    /// Gets or sets the user address.
+    /// </summary>
+    public Address? Address { get; set; }
+}
+
+public class Address
+{
+    /// <summary>
+    /// Gets or sets the city value.
+    /// </summary>
+    public string? City { get; set; }
+}