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

src/ZB.MOM.WW.CBDDC.Core/Storage/CorruptDatabaseException.cs

@@ -0,0 +1,16 @@
+using System;
+
+namespace ZB.MOM.WW.CBDDC.Core.Storage;
+
+/// <summary>
+/// Represents an error that occurs when a database is found to be corrupt.
+/// </summary>
+public class CorruptDatabaseException : Exception
+{
+    /// <summary>
+    /// Initializes a new instance of the <see cref="CorruptDatabaseException"/> class.
+    /// </summary>
+    /// <param name="message">The exception message.</param>
+    /// <param name="innerException">The underlying exception that caused this error.</param>
+    public CorruptDatabaseException(string message, Exception innerException) : base(message, innerException) { }
+}