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/SampleDbContext.cs

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+using BLite.Core.Collections;
+using BLite.Core.Metadata;
+using BLite.Core.Storage;
+using ZB.MOM.WW.CBDDC.Persistence.BLite;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ZB.MOM.WW.CBDDC.Sample.Console;
+
+public partial class SampleDbContext : CBDDCDocumentDbContext
+{
+    /// <summary>
+    /// Gets the users collection.
+    /// </summary>
+    public DocumentCollection<string, User> Users { get; private set; } = null!;
+
+    /// <summary>
+    /// Gets the todo lists collection.
+    /// </summary>
+    public DocumentCollection<string, TodoList> TodoLists { get; private set; } = null!;
+
+    /// <summary>
+    /// Initializes a new instance of the SampleDbContext class using the specified database file path.
+    /// </summary>
+    /// <param name="databasePath">The file system path to the database file. Cannot be null or empty.</param>
+    public SampleDbContext(string databasePath) : base(databasePath)
+    {
+    }
+
+    /// <summary>
+    /// Initializes a new instance of the SampleDbContext class using the specified database file path and page file
+    /// configuration.
+    /// </summary>
+    /// <param name="databasePath">The file system path to the database file. Cannot be null or empty.</param>
+    /// <param name="config">The configuration settings for the page file. Cannot be null.</param>
+    public SampleDbContext(string databasePath, PageFileConfig config) : base(databasePath, config)
+    {
+    }
+
+    /// <inheritdoc />
+    protected override void OnModelCreating(ModelBuilder modelBuilder)
+    {
+        base.OnModelCreating(modelBuilder);
+        modelBuilder.Entity<User>()
+            .ToCollection("Users")
+            .HasKey(u => u.Id);
+
+        modelBuilder.Entity<TodoList>()
+            .ToCollection("TodoLists")
+            .HasKey(t => t.Id);
+    }
+}